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Common core math, math worksheet generators, printable game generators, printable ninth grade (grade 9) worksheets, tests, and activities.

Print our Ninth Grade (Grade 9) worksheets and activities, or administer them as online tests. Our worksheets use a variety of high-quality images and some are aligned to Common Core Standards.

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• 20th Century Music Devices
• Big Band History
• History of the Blues
• Music During the Renaissance
• Musical Symbols
• The Baroque Period
• The Clarinet
• The History of Swing
• The Saxophone
• Writing Notation - grades 9-10
• All About Beethoven
• Jazz History
• Musical Instrument Comprehensive
• Solfege Singing Assessment
• The History of Bebop
• The Western Concert Flute (C Flute)

Compare and Contrast

• A Beautiful Shawl (Fiction)
• Compare and Contrast - Informational
• Compare and Contrast Mixed Genre
• Moths vs. Butterflies
• Compare and Contrast - Fiction
• Compare and Contrast Mix
• Compare and Contrast Science
• Rainforest Frogs
• ESL: Question Tags
• Grade 9 Grammar Review
• Fill-in-the-Blank Grammar Quiz
• Identifying Phrases

Literature - Books, Stories

• All Quiet on the Western Front
• Characters of To Kill a Mockingbird
• I Have a Dream
• Lord of the Flies
• Romeo and Juliet: Act 1, Scene 1
• Romeo and Juliet: Act 1, Scene 3
• Romeo and Juliet: Act 1, Scene 5
• Romeo and Juliet: Act 2, Scene 1
• Romeo and Juliet: Act 2, Scene 3
• Romeo and Juliet: Act 2, Scene 5
• Romeo and Juliet: Act 3, Scene 1
• Romeo and Juliet: Act 3, Scene 3
• Romeo and Juliet: Act 3, Scene 5
• Romeo and Juliet: Act 4, Scenes 2-5
• Romeo and Juliet: Act 5: Scenes 1-2
• The Autobiography of Malcolm X
• The Book Thief
• The Harlem Renaissance
• The Necklace
• The Outsiders: Chapter 1
• The Outsiders: Chapter 2
• The Outsiders: Chapter 4
• The Outsiders: Chapter 6
• The Outsiders: Chapter 8
• The Outsiders: Chapters 10-11
• The Pearl: Chapter 2
• The Pearl: Chapter 5
• The Secret Life of Walter Mitty
• Animal Farm
• Forged by Fire
• Jabberwocky
• Romeo and Juliet
• Romeo and Juliet: Act 1, Scene 2
• Romeo and Juliet: Act 1, Scene 4
• Romeo and Juliet: Act 2, Prologue
• Romeo and Juliet: Act 2, Scene 2
• Romeo and Juliet: Act 2, Scene 4
• Romeo and Juliet: Act 2, Scene 6
• Romeo and Juliet: Act 3, Scene 2
• Romeo and Juliet: Act 3, Scene 4
• Romeo and Juliet: Act 4, Scene 1
• Romeo and Juliet: Act 5, Scene 3
• The Most Dangerous Game
• The Outisders: Discussion Questions
• The Outsiders: Chapter 12
• The Outsiders: Chapter 3
• The Outsiders: Chapter 5
• The Outsiders: Chapter 7
• The Outsiders: Chapter 9
• The Pearl: Chapter 1
• The Pearl: Chapter 3
• The Pearl: Chapter 6
• Finding Main Idea
• On the Stage
• Main Idea - grade 9
• Theme in Fiction - grade 9
• Making Inferences and Drawing Conclusions
• Making Inferences

Text Analysis

• Analyzing a Biography
• Analyzing a Poem #2 - grade 9
• Analyzing a Technical Text
• Analyzing Character
• Analyzing Speeches
• Critical Thinking
• Health Text Analysis
• Identifying Oxymoron
• Informational Texts - Tourism
• Poem Analysis: A Wish and Lucy
• Poem Analysis: The Lotos-Eaters
• Scientific Text Analysis
• Short Informational Texts
• Structure of a Dramatic Text
• Analyzing a Character #2
• Analyzing a Speech
• Analyzing an Informational Text
• Analyzing Prose
• Comparing Movements
• Euphemism Meanings
• Identifying Hyperbole
• Informational Texts - Personality
• Paradox and Oxymoron
• Poem Analysis: Sir Galahad
• Primary and Secondary Sources
• Scientific Text Analysis #2
• Spoken Word Poem Analysis
• Vocabulary in Literature
• 8th Grade Social Studies Vocabulary
• Medal vs. Meddle
• Moral vs. Morale
• Rational vs. Rationale
• Taught vs. Taut
• Vocabulary Review 2
• Allude vs. Elude
• Meet vs. Mete
• Physical Science Vocabulary
• Stationary vs. Stationery
• Vocabulary Review
• A Serious Lie
• Analyzing a Short Advertisement: Puppy
• Elements of an Argumentative Piece
• Pep Rallies
• The Importance of Recycling
• Would You Give Up Everything?
• Analyzing a Short Ad: Apple a Day
• Don't Judge a Book
• Favorite Toy
• Personality
• The Ripple Effect
• Child Development Stages
• Peer Relationships
• Social media Tips
• E-mail Etiquette
• Professionalism in the Workplace
• Stress Management

Function and Algebra Concepts

• Adding Polynomials
• Algebra I Review
• Algebraic Expressions - Word Problems
• Arithmetic Sequences - Practice #2
• Degrees and Classification of Polynomials
• Equations of Parallel & Perpendicular Lines
• Evaluating Algebraic Expressions - Practice #2
• Exponent Rules - Distribution & Powers of Powers
• Exponent Rules - Quotient Rule
• Finding Linear Equations from Slope & a Point #2
• Finding Linear Equations from Two Points #2
• Finding Slope and Intercepts - Practice #2
• Finding Slope from Two Points - Practice #2
• Geometric Sequences
• Graphing Linear Equations - Practice #2
• Identify Constant Rate of Change
• Identifying Parallel and Perpendicular Lines - #2
• Linear Equation Word Problems
• Literal Equations
• Literal Equations - Practice #3
• Modeling Polynomials with Algebra Tiles
• Multiplying by Monomials
• One-Step Linear Inequalities
• Polynomials
• Polynomials, Adding and Subtracting (M/C)
• Polynomials, Multiplying
• Rewriting Linear Equations
• Simplifying Algebraic Expressions - Practice #2
• Simplifying Algebraic Expressions in 2 Variables
• Simplifying Exponent Expressions - Practice #2
• Simplifying Monomial Expressions
• Solving Linear Equations - Practice #2
• Solving Linear Equations - Variable on Both Sides
• Solving Linear Equations-Variable on Both Sides, MC
• Solving Linear Inequalities - Practice #2
• Solving Linear Two-Step Equations
• Solving One-Step Equations
• Systems of Linear Equations
• Translating Between Words & Algebraic Expressions
• Understanding Arithmetic & Geometric Sequences
• Algebra I Mid-Year Review
• Algebra I Review, #2
• Arithmetic Sequences - Practice #1
• Completing the Square
• Diameter and Circumference
• Evaluating Algebraic Expressions - Practice #1
• Exponent Expressions with Negative Exponents
• Exponent Rules - Product Rule
• Finding Linear Equations from Slope & a Point
• Finding Linear Equations from Two Points
• Finding Slope and Intercepts
• Finding Slope from Two Points
• Finite Geometric Series
• Graphing Linear Equations - Practice #1
• Graphing Word Problems
• Identifying Parallel and Perpendicular Lines
• Inequalities
• Linear Equation Word Problems, M/C
• Literal Equations - Practice #2
• Logarithmic Equations
• Multiplying by Binomials
• Natural Logarithms
• Parts of Algebraic Equations
• Polynomials, Adding and Subtracting
• Polynomials, Adding and Subtracting - Practice #2
• Quadratic Equations
• Simplifying Algebraic Expressions - Practice #1
• Simplifying Algebraic Expressions in 1 Variable
• Simplifying Exponent Expressions
• Simplifying Exponent Expressions - Practice #3
• Simplifying Polynomials
• Solving Linear Equations
• Solving Linear Equations - Practice #3
• Solving Linear Equations Involving Fractions
• Solving Linear Inequalities - Practice #1
• Solving Linear One-Step Equations, M/C
• Solving Linear Two-Step Equations, M/C
• Subtracting Polynomials
• The Imaginary Unit, i
• Translating Word Problems into Equations
• Understanding How to Solve Simple Equations

Geometry and Measurement

• Calculating the Midpoint of Line Segments
• Identifying Points' Coordinates and Quadrants
• Parallel and Perpendicular Lines and Planes
• Transformations - Practice #1
• Types of Triangles
• Graphing with Correct Scale and Units
• Parallel and Perpendicular Lines
• Parallel Lines Cut by a Transversal
• Triangle Inequality Theorem
• Volumes of Solid Figures

High School Math

• Combinations
• Literal Equations - Practice #1
• Mean, Median, Mode, and Range
• Permutations
• Verifying Solutions to Inequalities
• Logarithmic Equations - Practice #1
• Systems of Linear Equations (M/C & T/F)

Statistics and Probability

Word problems.

• Astronomy Test
• Hubble Sequence
• Jovian Planets
• Lunar Surface
• Sun Diagram
• The Right Stuff
• Hertzsprung-Russell Diagram #2
• Inner Planets
• Life Cycle of Stars
• Planetary Motion
• Stars: Temperature and Brightness
• Sun Structure and Activity
• Terrestrial Planets
• Appendicular Skeleton
• Muscular System
• Organism Classification
• Flower Structure
• Photosynthesis
• Acids and Bases
• Bonding and Mixtures
• Electrolytes
• Naming Polyatomic Ions
• Periodic Table Trends
• Acids and Bases #2
• Chemical Bonds
• Element Symbols and Names
• Molecules and Compounds
• Organic Chemistry
• Solubility Curves

Earth Science

• Atmospheric Layers Diagram
• Coastal Geology
• Environmental Dilemmas
• Geologic Periods
• Hazardous Material Spill
• Hydrologic Cycle Diagram
• Identifying Landforms
• Identifying Sedimentary Rocks
• Igneous Rocks
• Intrusive and Extrusive Igneous Rocks
• Meandering River Diagram
• Mineral Groups
• Mountain Types
• Ocean Currents
• Ocean Tides
• Seafloor Topography
• Subduction Zone Diagram
• Surface Ocean Currents Map
• Weather Front Diagrams
• Carbon Cycle Diagram
• Earth's Interior
• Fault Types
• Global Climate Change
• Hurricane Formation
• Identifying Igneous Rocks
• Identifying Metamorphic Rocks
• Identifying Tectonic Plates
• Interpreting Geologic Cross Sections
• Layers of the Atmosphere
• Metamorphism
• Nitrogen Cycle Diagram
• Ocean Exploration
• Seafloor Spreading
• Seawater Properties
• Soil Horizons Diagram
• Streams and Rivers
• Subduction Zones
• Topographic Map Worksheet
• Water Resources Vocabulary
• Weather Map

Forces and Motion

• Levers/Mechanical Advantage
• Law of Universal Gravitation
• Mechanical Advantage - Advanced

High School Science

• Bernoulli’s Principle
• Electricity and Circuits
• Electromagnetic Spectrum
• Kinetic/Potential Energy
• Laboratory Safety
• Parts of a Lab Report
• Resistance and Ohm's Law
• Doppler Effect
• Electric Circuits
• Independent and Dependent Variables
• Lab Glassware
• Lab Report Checklist

Middle School Science

• Work and Power

Physical Science

• Alternative Energy Sources
• Hypotheses and Inquiry
• Controls and Variables
• Human Environmental Impacts
• The Scientific Method
• Comparing Cultures Activity
• Economic System Activity
• Is is a Reliable Source?
• US Constitution and Branches of Government Test
• Bonds that Unite a Country
• Contextualization
• Forms of Government Activity
• Multiple Perspectives in History
• Zoroastrianism

Ancient and World History

• African Imperialism
• Ancient China
• Ancient Greek Art
• Ancient Rome Test
• Berlin Wall
• European Middle Ages
• Imperialism
• Renaissance Quiz
• West African Trading Empires
• Ancient Egypt
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• Enlightenment and Scientific Revolution
• Global Issues
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• The British Parliament
• World War I
• Asian Geography Overview
• Geography of Africa
• Transatlantic Slave Trade
• Features of Geography
• America in the 1920s
• Civil Rights Test
• Independence Day
• Memorial Day
• Bleeding Kansas
• FDR's Alphabet Soup
• President's Day Quiz

Business Technology

• Digital Photography
• Entrepreneurship: Pricing and Profits
• Microsoft PowerPoint Overview
• The Business Plan
• Entrepreneurship Introduction
• Entrepreneurship: Types of Businesses
• Shortcuts in Microsoft Word

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9th Grade Math Worksheets

Understand the logic behind euclid's geometry, heron's formula, probability and more with 9th grade math worksheets..

• NCERT Solutions
• NCERT Class 9
• NCERT 9 Maths

NCERT Solutions for Class 9 Maths

Ncert solutions for class 9 maths – free pdf updated for 2023-24 session.

NCERT Solutions for Class 9 Maths includes solutions to all the questions given in the NCERT textbook for Class 9. The students can download PDFs of chapter-wise solutions to these problems from the links provided below on this page. These NCERT Solutions for Class 9   cover all the topics included in the NCERT textbook, like Number System, Coordinate Geometry, Polynomials, Euclid’s Geometry, Quadrilaterals, Triangles, Circles, Constructions, Surface Areas and Volumes, Statistics, Probability, etc.

With the help of these Solutions of NCERT Books for Class 9 Maths , students can practise all types of questions from the chapters. The  CBSE Class 9 Maths Solutions have been designed by our experts in a well-structured format to provide several possible methods of answering the problems and ensure a proper understanding of concepts. The students are suggested to practise all these solutions thoroughly for their exams. It will also help them in building a foundation for higher-level classes.

NCERT Solutions Class 9 Maths Chapters

• Chapter 1 Number System
• Chapter 2 Polynomials
• Chapter 3 Coordinate Geometry
• Chapter 4 Linear Equations in Two Variables
• Chapter 5 Introduction to Euclids Geometry
• Chapter 6 Lines and Angles
• Chapter 7 Triangles
• Chapter 8 Quadrilaterals
• Chapter 9 Circles
• Chapter 10 Heron’s Formula
• Chapter 11 Surface Areas and Volumes
• Chapter 12 Statistics

The following chapters have been removed from the NCERT Class 9 Maths textbook 2023-24. 

• Areas of Parallelograms and Triangles
• Constructions
• Probability

Along with NCERT Solutions , students are also provided with other online learning materials available at BYJU’S, such as notes, books, question papers, exemplar problems, worksheets etc. These materials are designed with respect to the CBSE syllabus and NCERT curriculum. Students are also advised to practise CBSE Class 9 Sample Papers to get an idea of the question pattern in the final exam.

15 chapters are present in the NCERT Solutions for Class 9 Maths . These chapters given in the NCERT Class 9 Maths lay a foundation for the chapters present in Class 10. The PDFs given at BYJU’S are accessible to everyone and can be downloaded by the students for free.

NCERT Solutions of Class 9 Maths Book Chapter Brief:

Students having trouble solving tough Math problems can refer to these CBSE Maths Class 9 Solutions of NCERT for better guidance and for quick review. Solving these exercises in each chapter will ensure positive results.

NCERT Solutions Class 9 Maths Chapter 1 Number System

This chapter discusses different topics, including rational numbers and irrational numbers. Students will also be learning the extended version of the number line and how to represent numbers (integers, rational and irrational) on it. A total of 6 exercises are present in this chapter that contains the problems based on all the topics asked in the chapter. This chapter also teaches students the representation of terminating/non-terminating recurring decimals (and successive magnification method) as well as the presentation of square roots of 2, 3 and other non-rational numbers on the number line. The chapter also deals with the laws of integral powers and rational exponents with positive real bases in the Number System.

Topics Covered in Class 9 Maths Chapter 1 Number System

Review of representation of natural numbers, integers, and rational numbers on the number line. Representation of terminating/non-terminating recurring decimals on the number line through successive magnification. Rational numbers as recurring/terminating decimals.

Examples of nonrecurring/non-terminating decimals such as √2, √3, √5 etc. Existence of non-rational numbers (irrational numbers) such as √2, √3 and their representation on the number line. Explaining that every real number is represented by a unique point on the number line, and conversely, every point on the number line represents a unique real number.

Existence of √x for a given positive real number x (visual proof to be emphasised). Definition of n th root of a real number.

Recall of laws of exponents with integral powers. Rational exponents with positive real bases (to be done by particular cases, allowing the learner to arrive at the general laws).

Rationalisation (with precise meaning) of real numbers of the type (and their combinations) \(\begin{array}{l}\frac{1}{a+b\sqrt{x}}\: and\: \frac{1}{\sqrt{x}+\sqrt{\sqrt{y}}}\end{array} \) where x and y are natural numbers, and a and b are integers.

Important Formulas – 

Operations on Real Numbers

√(a/b) = √a/√b

√ab = √a √b

(√a + √b) (√a – √b) = a – b

(a + √b) (a – √b) = a 2 – b

(√a + √b) (√c + √d) = √ac + √ad + √bc + √bd

(√a + √b) 2 = a + 2√ab + b

Laws of Exponents for Real Numbers

a m . a n = a m + n

(a m ) n = a mn

a m /a n = a m – n , m > n

a m b m = (ab) m

Also, access the following resources for Class 9 Chapter 1 Number System, at BYJU’S:

• NCERT Number System Class 9 Notes
• Number System Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Number Systems
• RD Sharma Solutions Number Systems Class 9

Which is the best app for learning math?

We just saw all the solutions to the exercises given in the NCERT math textbook for class 9 for chapter 1 – Number System. Do you want to learn this and all other math concepts in a fun way, with engaging videos? BYJU’S The Learning App has you covered.

BYJU’S The Learning App for grade 9 math contains:

• 80+ math videos (~1500 minutes of content!)
• ~70 gamified interactive learning experiences
• Complete coverage of your school syllabus
• Important questions
• Summary cards to revise formulae
• Practice tests
• 24 X 7 access to learning resources

BYJU’S The Learning App for class 9 also covers History, Civics, Geography, Economics, Biology, Physics, and Chemistry. 

Click here to know more about why BYJU’S The Learning App is the best app for learning math.

NCERT Solutions Class 9 Maths Chapter 2 Polynomials

This chapter discusses a particular type of algebraic expression called polynomial and the terminology related to it. Polynomial is an expression that consists of variables and coefficients involving the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables. The chapter also deals with the Remainder Theorem and the Factor Theorem with the uses of these theorems in the factorisation of polynomials. Students will be taught several examples as well as the definition of different terms like polynomials, degrees, coefficients, zeros and terms of a polynomial. A total of 5 exercises are present in this chapter, which includes problems related to all the topics mentioned in the chapter.

Topics Covered in Class 9 Maths Chapter 2 Polynomials

Definition of a polynomial in one variable, its coefficients, with examples and counter examples, its terms, zero polynomial. Degree of a polynomial. Constant, linear, quadratic, cubic polynomials; monomials, binomials, trinomials. Factors and multiples. Zeros/roots of a polynomial/equation. State and motivate the Remainder Theorem with examples and analogy to integers. Statement and proof of the Factor Theorem. Factorisation of ax 2 + bx + c, a ≠ 0 where a, b, c are real numbers, and of cubic polynomials using the Factor Theorem.

Recall algebraic expressions and identities. Further identities of the type:

(x + y + z) 2 = x 2 + y 2 + z 2  + 2xy + 2yz + 2zx

(x ± y) 3  = x 3  ± y 3 ± 3xy (x ± y)

x 3  + y 3 + z 3 – 3xyz = (x + y + z) (x 2 + y 2 + z 2 – xy – yz – zx)

and their use in the factorisation of polynomials. Simple expressions are reducible to these polynomials.

Important Formulas –

(x + y) 2 = x 2 + 2xy + y 2

(x – y) 2 = x 2 – 2xy + y 2

x 2 – y 2 = (x + y) (x – y)

(x + y + z) 2 = x 2 + y 2 + z 2 + 2xy + 2yz + 2zx

(x + y) 3 = x 3 + y 3 + 3xy(x + y)

(x – y) 3 = x 3 – y 3 – 3xy(x – y)

x 3 + y 3 + z 3 – 3xyz = (x + y + z) (x 2 + y 2 + z 2 – xy – yz – zx)

Dividend = (Divisor × Quotient) + Remainder

Remainder Theorem

Let p(x) be any polynomial of degree greater than or equal to one, and let a be any real number. If p(x) is divided by the linear polynomial x – a, then the remainder is p(a).

Factor Theorem

If p(x) is a polynomial of degree n > 1 and a is any real number, then (i) x – a is a factor of p(x), if p(a) = 0, and (ii) p(a) = 0, if x – a is a factor of p(x).

Also, access the following resources for Class 9 Chapter 2 Polynomials, at BYJU’S:

• NCERT Polynomials Class 9 Notes 
• Polynomials Class 9 Important Questions 
• NCERT Exemplar Solutions Class 9 Polynomials
• RD Sharma Solutions factorisation of Polynomials Class 9

NCERT Solutions Class 9 Maths Chapter 3 Coordinate Geometry

The chapter Coordinate Geometry includes the concepts of the cartesian plane, coordinates of a point in xy–plane, terms, and notations associated with the coordinate plane, including the x-axis, y-axis, x- coordinate, y-coordinate, origin, quadrants and more. Students, in this chapter, will also be studying the concepts of abscissa and ordinates of a point as well as plotting and naming a point in xy–plane. There are 3 exercises in this chapter that contain questions revolving around the topics mentioned in the chapter, helping the students get thorough with the concepts.

Topics Covered in Class 9 Maths Chapter 3 Coordinate Geometry

The Cartesian plane, coordinates of a point, names and terms associated with the coordinate plane, notations, plotting points in the plane, graph of linear equations as examples; focus on linear equations of the type ax + by + c = 0 by writing it as y =mx + c and linking with the chapter on linear equations in two variables.

Important Points – 

• To locate the position of an object or a point in a plane, we require two perpendicular lines. One of them is horizontal, and the other is vertical.
• The plane is called the Cartesian, or coordinate plane, and the lines are called the coordinate axes.
• The horizontal line is called the x-axis, and the vertical line is called the y-axis.
• The coordinate axes divide the plane into four parts called quadrants.
• The point of intersection of the axes is called the origin.
• The distance of a point from the y-axis is called its x-coordinate, or abscissa, and the distance of the point from the x-axis is called its y-coordinate, or ordinate.

Also, access the following resources for Class 9 Chapter 3 Coordinate Geometry, at BYJU’S:

• NCERT Coordinate Geometry Class 9 Notes
• Coordinate Geometry Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Coordinate Geometry
• RD Sharma Solutions Coordinate Geometry Class 9

NCERT Solutions Class 9 Maths Chapter 4 Linear Equations in Two Variables

Along with recalling the knowledge of linear equations in one variable, this chapter will introduce the students to the linear equation in two variables, i.e. ax + by + c = 0. Students will also learn to plot the graph of a linear equation in two variables. There are 4 exercises in this chapter that consist of questions related to finding the solutions of a linear equation, plotting a linear equation on the graph and other topics discussed in the chapter.

Topics Covered in Class 9 Maths Chapter 4 Linear Equations in Two Variables:

Recall of linear equations in one variable. Introduction to the equation in two variables. Prove that a linear equation in two variables has infinitely many solutions, and justify their being written as ordered pairs of real numbers, plotting them and showing that they seem to lie on a line. Examples, problems from real life, including problems on Ratio and Proportion and with algebraic and graphical solutions being done simultaneously.

Important Points –

• An equation of the form ax + by + c = 0, where a, b and c are real numbers, such that a and b are not both zero, is called a linear equation in two variables.
• A linear equation in two variables has infinitely many solutions.
• The graph of every linear equation in two variables is a straight line.
• x = 0 is the equation of the y-axis, and y = 0 is the equation of the x-axis.
• The graph of x = a is a straight line parallel to the y-axis.
• The graph of y = a is a straight line parallel to the x-axis.
• An equation of the type y = mx represents a line passing through the origin.

Also, access the following resources for Class 9 Chapter 4 Linear Equations in Two Variables, at BYJU’S:

• NCERT Linear Equations in Two Variables Class 9 Notes
• Linear Equations in Two Variables Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Linear Equations in Two Variables
• RD Sharma Solutions Linear Equations in Two Variables Class 9

NCERT Solutions Class 9 Maths Chapter 5 Introduction to Euclid’s Geometry

This chapter discusses Euclid’s approach to geometry and tries to link it with present-day geometry. Introduction to Euclid’s Geometry provides the students with a method of defining common geometrical shapes and terms. Students will be taken deeper into the topic of axioms, postulates and theorems with the two exercises present in the chapter.

Topics Covered in Class 9 Maths Chapter 5 Introduction to Euclid’s Geometry:

History – Euclid and geometry in India. Euclid’s method of formalising observed phenomenon into rigorous mathematics with definitions, common/obvious notions, axioms/postulates, and theorems. The five postulates of Euclid. Equivalent versions of the fifth postulate. Showing the relationship between axiom and theorem. 1. Given two distinct points, there exists one and only one line through them. 2. (Prove) Two distinct lines cannot have more than one point in common.

Important Axioms and Postulates – 

Some of Euclid’s axioms are:

(1) Things which are equal to the same thing are equal to one another.

(2) If equals are added to equals, the wholes are equal.

(3) If equals are subtracted from equals, the remainders are equal.

(4) Things which coincide with one another are equal to one another.

(5) The whole is greater than the part.

(6) Things which are double of the same things are equal to one another.

(7) Things which are halves of the same thing are equal to one another.

Euclid’s Five Postulates

Postulate 1 – A straight line may be drawn from any one point to any other point.

Postulate 2 – A terminated line can be produced indefinitely.

Postulate 3 – A circle can be drawn with any centre and any radius.

Postulate 4 – All right angles are equal to one another.

Postulate 5 – If a straight line falling on two straight lines makes the interior angles on the same side of it taken together less than two right angles, then the two straight lines, if produced indefinitely, meet on that side on which the sum of angles is less than two right angles.

Also, access the following resources for Class 9 Chapter 5 Introduction to Euclid’s Geometry, at BYJU’S:

• NCERT Introduction to Euclid’s Geometry Class 9 Notes
• Introduction to Euclid’s Geometry Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Introduction to Euclid’s Geometry
• RD Sharma Solutions Introduction to Euclid’s Geometry Class 9

NCERT Solutions Class 9 Maths Chapter 6 Lines and Angles

This chapter revolves around the theorems present in the topics of Lines and Angles. Students might often be asked to prove the statements given in the questions. There are 3 exercises in the chapter, solving which students would be able to understand the concepts covered in the chapter thoroughly. There are four axioms and eight theorems covered in the chapter.

Topics Covered in Class 9 Maths Chapter 6 Lines and Angles:

1. (Motivate) If a ray stands on a line, then the sum of the two adjacent angles so formed is 180° and the converse. 2. (Prove) If two lines intersect, the vertically opposite angles are equal. 3. (Motivate) Results on corresponding angles, alternate angles, and interior angles when a transversal intersects two parallel lines. 4. (Motivate) Lines, which are parallel to a given line, are parallel. 5. (Prove) The sum of the angles of a triangle is 180°. 6. (Motivate) If a side of a triangle is produced, the exterior angle so formed is equal to the sum of the two interior opposite angles.

• If a ray stands on a line, then the sum of the two adjacent angles so formed is 180° and vice versa. This property is called the Linear pair axiom.
• If two lines intersect each other, then the vertically opposite angles are equal.
• If a transversal intersects two parallel lines, then

(i) each pair of corresponding angles is equal,

(ii) each pair of alternate interior angles is equal,

(iii) each pair of interior angles on the same side of the transversal is supplementary.

• If a transversal intersects two lines such that, either

(i) any one pair of corresponding angles is equal, or

(ii) any one pair of alternate interior angles is equal, or

(iii) any one pair of interior angles on the same side of the transversal is supplementary, then the lines are parallel.

Also, access the following resources for Class 9 Chapter 6 Lines and Angles, at BYJU’S:

• NCERT Lines and Angles Class 9 Notes
• Lines and Angles Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Lines and Angles
• RD Sharma Solutions Lines and Angles Class 9

NCERT Solutions Class 9 Maths Chapter 7 Triangles

In this chapter, students will study in detail the congruence of triangles, rules of congruence, some properties of triangles and the inequalities in triangles. The chapter has a total of 5 exercises, in which the students are asked “to-prove” as well as application-level problems. With this chapter, students will also learn to prove the properties that they learnt in earlier classes. The chapter also teaches the students to apply the various congruence rules while solving the problems. There are about eight theorems covered in this chapter.

Topics Covered in Class 9 Maths Chapter 7 Triangles:

1. (Motivate) Two triangles are congruent if any two sides and the included angle of one triangle is equal to any two sides and the included angle of the other triangle (SAS Congruence). 2. (Prove) Two triangles are congruent if any two angles and the included side of one triangle is equal to any two angles and the included side of the other triangle (ASA Congruence). 3. (Motivate) Two triangles are congruent if the three sides of one triangle are equal to the three sides of the other triangle (SSS Congruence). 4. (Motivate) Two right triangles are congruent if the hypotenuse and a side of one triangle are equal (respectively) to the hypotenuse and a side of the other triangle. 5. (Prove) The angles opposite to equal sides of a triangle are equal. 6. (Motivate) The sides opposite to equal angles of a triangle are equal. 7. (Motivate) Triangle inequalities and the relation between ‘angle and facing side’; inequalities in a triangle.

Important Axioms and Theorems –

Axiom 7.1 (SAS congruence rule) – Two triangles are congruent if two sides and the included angle of one triangle are equal to the two sides and the included angle of the other triangle.

Theorem 7.1 (ASA congruence rule) – Two triangles are congruent if two angles and the included side of one triangle are equal to two angles and the included side of the other triangle.

Theorem 7.2 – Angles opposite to equal sides of an isosceles triangle are equal.

Theorem 7.3 – The sides opposite to equal angles of a triangle are equal.

Theorem 7.4 (SSS congruence rule) – If the three sides of one triangle are equal to the three sides of another triangle, then the two triangles are congruent.

Theorem 7.5 (RHS congruence rule) – If in two right triangles, the hypotenuse and one side of one triangle are equal to the hypotenuse and one side of the other triangle, then the two triangles are congruent.

Theorem 7.6 – If two sides of a triangle are unequal, the angle opposite to the longer side is larger (or greater).

Theorem 7.7 – In any triangle, the side opposite to the larger (greater) angle is longer.

Theorem 7.8 – The sum of any two sides of a triangle is greater than the third side.

Also, access the following resources for Class 9 Chapter 7 Triangles, at BYJU’S:

• NCERT Triangles Class 9 Notes
• Triangles Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Triangles
• RD Sharma Solutions Triangles Class 9

NCERT Solutions Class 9 Maths Chapter 8 Quadrilaterals

A figure obtained by joining four points in order is called a quadrilateral. This chapter takes the students to the depth of the topics of Quadrilaterals. The chapter contains 2 exercises that contain only one theorem to prove. However, there are a total of nine theorems that can be used to solve the application or conceptual-level questions asked. The angle sum property of a quadrilateral, types of quadrilaterals, properties of a parallelogram, and the mid-point theorem are explained in this chapter to help the students in learning the concepts thoroughly.

Topics Covered in Class 9 Maths Chapter 8 Quadrilaterals:

1. (Prove) The diagonal divides a parallelogram into two congruent triangles. 2. (Motivate) In a parallelogram, opposite sides are equal and conversely. 3. (Motivate) In a parallelogram, opposite angles are equal and conversely. 4. (Motivate) A quadrilateral is a parallelogram if a pair of its opposite sides are parallel and equal. 5. (Motivate) In a parallelogram, the diagonals bisect each other conversely. 6. (Motivate) In a triangle, the line segment joining the midpoints of any two sides is parallel to the third side and (motivate) its converse.

Important Theorems –

A quadrilateral has four sides, four angles and four vertices.

Angle Sum Property of a Quadrilateral – The sum of the angles of a quadrilateral is 360 o .

Theorem 8.1 – A diagonal of a parallelogram divides it into two congruent triangles

Theorem 8.2 – In a parallelogram, opposite sides are equal.

Theorem 8.3 – If each pair of opposite sides of a quadrilateral is equal, then it is a parallelogram.

Theorem 8.4 – In a parallelogram, opposite angles are equal.

Theorem 8.5 – If in a quadrilateral, each pair of opposite angles is equal, then it is a parallelogram.

Theorem 8.6 – The diagonals of a parallelogram bisect each other.

Theorem 8.7 – If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

Theorem 8.8 – A quadrilateral is a parallelogram if a pair of opposite sides are equal and parallel.

Theorem 8.9 – The line segment joining the mid-points of two sides of a triangle is parallel to the third side.

Theorem 8.10 – The line drawn through the mid-point of one side of a triangle, parallel to another side, bisects the third side.

Also, access the following resources for Class 9 Chapter 8 Quadrilaterals, at BYJU’S:

• NCERT Quadrilaterals Class 9 Notes
• Quadrilaterals Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Quadrilaterals
• RD Sharma Solutions Quadrilaterals Class 9

NCERT Solutions Class 9 Maths Chapter 9 Areas of Parallelograms and Triangles

In this chapter, an attempt has been made to consolidate the knowledge about the formulae to find the areas of different figures by studying relationships between the areas of geometric figures, provided they lie on the same base and between the same parallels. This study will also be useful in understanding some results on the ‘similarity of triangles’. The chapter contains 4 exercises, of which most of the questions ask the students to prove the statements given.

Topics Covered in Class 9 Maths Chapter 9 Areas of Parallelograms and Triangles:

Review the concept of area and recall the area of a rectangle. 1. (Prove) Parallelograms on the same base and between the same parallels have the same area. 2. (Motivate) Triangles on the same base and between the same parallels are equal in area and its converse.

Theorem 9.1 – Parallelograms on the same base and between the same parallels are equal in area.

Theorem 9.2 – Two triangles on the same base (or equal bases) and between the same parallels are equal in area.

Theorem 9.3 – Two triangles having the same base (or equal bases) and equal areas lie between the same parallels.

Also, access the following resources for Class 9 Chapter 9 Areas of Parallelograms and Triangles, at BYJU’S:

• NCERT Areas of Parallelograms and Triangles Class 9 Notes
• Areas of Parallelograms and Triangles Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Areas of Parallelograms and Triangles
• RD Sharma Solutions Areas of Parallelograms and Triangles Class 9

NCERT Solutions Class 9 Maths Chapter 10 Circles

A circle can be defined as a collection of all the points in a plane at a fixed distance from a fixed point in the plane. Topics like Angle Subtended by a Chord at a Point, Equal Chords and their respective distances from the Centre, the Angle Subtended by an Arc of a Circle, Cyclic Quadrilaterals and other terms related to circles are covered in this chapter. A total of twelve theorems are present in this chapter, learning which the students will get a clearer idea of the concepts taught. There are 6 exercises in this chapter which consist of questions from all the concepts present in the chapter.

Topics Covered in Class 9 Maths Chapter 10 Circles:

Through examples, arrive at definitions of circle-related concepts, radius, circumference, diameter, chord, arc, and subtended angle. 1. (Prove) Equal chords of a circle subtend equal angles at the centre and (motivate) its converse. 2. (Motivate) The perpendicular from the centre of a circle to a chord bisects the chord, and conversely, the line drawn through the centre of a circle to bisect a chord is perpendicular to the chord. 3. (Motivate) There is one and only one circle passing through three given non-collinear points. 4. (Motivate) Equal chords of a circle (or of congruent circles) are equidistant from the centre(s) and conversely. 5. (Prove) The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle. 6. (Motivate) Angles in the same segment of a circle are equal. 7. (Motivate) If a line segment joining two points subtends equal angles at two other points lying on the same side of the line containing the segment, the four points lie on a circle. 8. (Motivate) The sum of either pair of opposite angles of a cyclic quadrilateral is 180 0 and its converse.

Theorem 10.1 – Equal chords of a circle subtend equal angles at the centre.

Theorem 10.2 – If the angles subtended by the chords of a circle at the centre are equal, then the chords are equal.

Theorem 10.3 – The perpendicular from the centre of a circle to a chord bisects the chord.

Theorem 10.4 – The line drawn through the centre of a circle to bisect a chord is perpendicular to the chord.

Theorem 10.5 – There is one and only one circle passing through three given non-collinear points.

Theorem 10.6 – Equal chords of a circle (or of congruent circles) are equidistant from the centre (or centres).

Theorem 10.7 – Chords equidistant from the centre of a circle are equal in length.

Theorem 10.8 – The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.

Theorem 10.9 – Angles in the same segment of a circle are equal.

Theorem 10.10 – If a line segment joining two points subtends equal angles at two other points lying on the same side of the line containing the line segment, the four points lie on a circle (i.e. they are concyclic).

Theorem 10.11 – The sum of either pair of opposite angles of a cyclic quadrilateral is 180º.

Theorem 10.12 – If the sum of a pair of opposite angles of a quadrilateral is 180º, the quadrilateral is cyclic.

Also, access the following resources for Class 9 Chapter 10 Circles, at BYJU’S:

• NCERT Circles Class 9 Notes
• Circles Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Circles
• RD Sharma Solutions Circles Class 9

NCERT Solutions Class 9 Maths Chapter 11 Constructions

In this chapter, students will learn some basic constructions. The method learnt will then be used to construct certain kinds of triangles. There are 2 exercises present in this chapter, of which the first exercise deals with the construction of a certain angle or the bisector of a given angle. On the other hand, the second exercise deals with the constructions of triangles when different parameters are given.

Topics Covered in Class 9 Maths Chapter 11 Constructions:

1. Construction of bisectors of a line segment and angle, 60°, 90°, 45° angles etc., equilateral triangles. 2. Construction of a triangle given its base, sum/difference of the other two sides and one base angle. 3. Construction of a triangle of given perimeter and base angles.

Construction 11.1 – To construct the bisector of a given angle.

Construction 11.2 – To construct the perpendicular bisector of a given line segment.

Construction 11.3 – To construct an angle of 600 at the initial point of a given ray.

Construction 11.4 – To construct a triangle, given its base, a base angle and the sum of the other two sides.

Construction 11.5 – To construct a triangle given its base, a base angle and the difference between the other two sides.

Construction 11.6 – To construct a triangle, given its perimeter and its two base angles.

Also, access the following resources for Class 9 Chapter 11 Constructions, at BYJU’S:

• NCERT Constructions Class 9 Notes
• Constructions Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Constructions
• RD Sharma Solutions Constructions Class 9

NCERT Solutions Class 9 Maths Chapter 12 Heron’s Formula

The chapter discusses Heron’s formula, which can be used to calculate the area of a triangle when the length of all three sides is given. In this method, there is no need to calculate the angles or other distances in the triangle. This formula can be used not only to find the area of triangles but also to find the areas of quadrilaterals and other polygons by dividing them into triangles. There are 2 exercises in this chapter which help the student understand the method of solving the problems based on Heron’s formula.

Topics Covered in Class 9 Maths Chapter 12 Heron’s Formula:

Area of a triangle using Heron’s formula (without proof) and its application in finding the area of a quadrilateral.

Area of a triangle = 1/2 × base × height

Where a, b and c are the sides of a triangle

s is the semi-perimeter, i.e. half of the perimeter of a triangle = (a + b + c)/2

Also, access the following resources for Class 9 Chapter 12 Heron’s Formula, at BYJU’S:

• NCERT Heron’s Formula Class 9 Notes
• Heron’s Formula Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Heron’s Formula
• RD Sharma Solutions Heron’s Formula Class 9

NCERT Solutions Class 9 Maths Chapter 13 Surface Areas and Volumes

In this chapter, students shall learn to find the surface areas and volumes of cuboids and cylinders in detail and broaden the study to some other solids, such as cones and spheres. This chapter is just an extended version of the chapter mensuration, in which the students learnt about the surface areas and volumes in earlier classes. There are 8 exercises in this chapter, and these exercises contain problems that are based on surface areas and volumes of different solids such as cubes, cuboids, spheres, cylinders, cones, and hemispheres.

Topics Covered in Class 9 Maths Chapter 13 Surface Areas and Volumes :

Surface areas and volumes of cubes, cuboids, spheres (including hemispheres) and right circular cylinders/cones.

Surface Area of a Cuboid = 2(lb + bh + hl)

where l, b and h are, respectively, the three edges of the cuboid

Surface Area of a Cube = 6a 2

where a is the edge of the cube.

Curved Surface Area of a Cylinder = 2πrh

where r is the radius of the base of the cylinder and h is the height of the cylinder

Total Surface Area of a Cylinder = 2πr(r + h)

where h is the height of the cylinder and r is its radius

Curved Surface Area of a Cone = 1/2 × l × 2πr = πrl

where r is its base radius, and l is its slant height

Total Surface Area of a Cone = πrl + πr 2 = πr(l + r)

Surface Area of a Sphere = 4 π r 2

where r is the radius of the sphere.

Curved Surface Area of a Hemisphere = 2πr 2

where r is the radius of the sphere of which the hemisphere is a part.

Total Surface Area of a Hemisphere = 3πr 2

Volume of a Cuboid = base area × height = length × breadth × height

Volume of a Cube = edge × edge × edge = a 3

Volume of a Cylinder = πr 2 h

where r is the base radius, and h is the height of the cylinder.

Volume of a Cone = 1/3 πr 2 h

where r is the base radius, and h is the height of the cone.

Volume of a Sphere = 4/3 πr 3

Volume of a Hemisphere = 2/3 πr 3

where r is the radius of the hemisphere.

Also, access the following resources for Class 9 Chapter 13 Surface Areas and Volumes, at BYJU’S:

• NCERT Surface Areas and Volumes Class 9 Notes
• Surface Areas and Volumes Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Surface Areas and Volumes
• RD Sharma Solutions Surface Areas and Volumes Class 9

NCERT Solutions Class 9 Maths Chapter 14 Statistics

The branch of Mathematics in which the extraction of meaningful information is studied is known as Statistics. It can also be defined as the collection of data on different aspects of the life of people useful to the State. The chapter teaches about the different presentations of the data, including the frequency distribution as well. The chapter also helps the students learn the graphical representation of data using different graphs such as Bar graphs, Histograms, Frequency polygons, etc. The chapter also lets the students learn the measure of central tendency mean, median and mode of the raw data. A total of 4 exercises are present in the chapter that includes problems related to all these concepts.

Topics Covered in Class 9 Maths Chapter 14 Statistics:

Introduction to Statistics: Collection of data, presentation of data – tabular form, ungrouped/grouped, bar graphs, histograms (with varying base lengths), frequency polygons, qualitative analysis of data to choose the correct form of presentation for the collected data. Mean, median, and mode of ungrouped data.

Statistics deals with the collection, presentation, and analysis of data, as well as the drawing of meaningful conclusions from the data.

Mean – It is found by adding all the values of the observations and dividing it by the total number of observations. It is denoted by \(\begin{array}{l}\overline{x}\end{array} \) .

Median – It is the value of the middle-most observation (s).

If n is an odd number, the median = value of the [(n + 1)/2] th observation

If n is an even number, median = Mean of the values of the (n/2) th and [(n/2) + 1] th observations.

Mode – The mode is the most frequently occurring observation.

Also, access the following resources for Class 9 Chapter 14 Statistics, at BYJU’S:

• NCERT Statistics Class 9 Notes
• Statistics Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Statistics
• RD Sharma Solutions Statistics Class 9

NCERT Solutions Class 9 Maths Chapter 15 Probability

The collection of some outcomes of an experiment is known as an event of an experiment. The chances of occurrence of an event are known as probability. In this chapter, students will learn to measure the chance of occurrence of a particular outcome in an experiment. This chapter contains only 1 exercise. The problems covered in this exercise are based on real-life incidents, enhancing the interest of the students in solving the questions.

Topics Covered in Class 9 Maths Chapter 15 Probability:

History, Repeated experiments and observed frequency approach to probability. Focus is on empirical probability. (A large amount of time to be devoted to group and to individual activities to motivate the concept; the experiments to be drawn from real-life situations and from examples used in the chapter on statistics).

The empirical probability P(E) of an event E happening is given by

P (E) = Number of trials in which the event happened/The total number of trials

Also, access the following resources for Class 9 Chapter 15 Probability, at BYJU’S:

• NCERT Probability Class 9 Notes
• Probability Class 9 Important Questions
• NCERT Exemplar Solutions Class 9 Probability
• RD Sharma Solutions Probability Class 9

Benefits of BYJU’S NCERT Maths Solutions for Class 9

• The solutions are given in easy steps so that students can easily understand them.
• Students can access these solutions for free and clear any doubts instantly.
• Exercise-wise PDFs are also provided for all chapters of CBSE 9th Class Maths.
• Detailed explanations also help students to develop problem-solving skills and help them to learn concepts more effectively.
• The questions are solved using the easiest method.
• Diagrams are also given to help students visualise the questions and solutions.

CBSE Class 9 Maths Unit-wise Weightage for 2023-24

Internal assessment class 9.

During the exam preparation, students should first complete the units carrying more weightage and then move on to the lower weightage. This helps students to first cover the important concepts and improves their confidence level to perform well in the annual exam.

The students are advised to analyse all the concepts covered in the Syllabus of Class 9 Maths and prepare a proper preparation strategy. It’s merely impossible to score well in Maths by simply reading and memorising the concepts. Students should always try to understand the concept and logic given in any particular topic. The students are suggested to practise these NCERT Solutions Class 9 materials on a regular basis to develop a strong understanding of basic mathematics concepts.

Along with the NCERT Solutions, we have also provided a brief summary of important formulas and different methods of solving similar problems to help students understand the concepts thoroughly. Keep visiting BYJU’S to get more updated learning materials, and download the BYJU’S app for a better and personalised learning experience with engaging video lessons.

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9th Grade Math Worksheets: FREE & Printable

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9th grade math concepts.

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Expressions and Equations

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Inequalities and System of Equations

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Polynomial Operations

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 Statistics and Probabilities

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Statistics and Probabilities

9th grade math practice questions, fractions and decimals, real numbers and integers, proportions and ratios, algebraic expressions, equations and inequalities, polynomials, exponents and radicals, solid figures.

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