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Class 9 CBSE Board Maths

13 modules

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UNIT I:

NUMBER SYSTEMS

1. REAL NUMBERS (18) Periods

. Review of representation of natural numbers, integers, and rational numbers on the number line. Rational numbers as recurring/ terminating decimals. Operations on real numbers. 2. Examples of non-recurring/non-terminating decimals. Existence of non-rational numbers (irrational numbers) such as , and their representation on the number line. Explaining that every real number is represented by a unique point on the number line and conversely, viz. every point on the number line represents a unique real number. 3. Definition of nth root of a real number. 4. Rationalization (with precise meaning) of real numbers of the type and (and their combinations) where x and y are natural number and a and b are integers. 5. Recall of laws of exponents with integral powers. Rational exponents with positive real bases (to be done by particular cases, allowing learner to arrive at the general laws.

UNIT II: ALGEBRA

1. POLYNOMIALS (26) Periods

Definition of a polynomial in one variable, with examples and counter examples. Coefficients of a polynomial, terms of a polynomial and zero polynomial. Degree of a polynomial. Constant, linear, quadratic and cubic polynomials. Monomials, binomials, trinomials. Factors and multiples. Zeros of a polynomial. Motivate and State the Remainder Theorem with examples. Statement and proof of the Factor Theorem. Factorization of ax2 + bx + c, a ≠ 0 where a, b and c are real numbers, and of cubic polynomials using the Factor Theorem. Recall of algebraic expressions and identities. Verification of identities:

2. LINEAR EQUATIONS IN TWO VARIABLES (16) Periods

Recall of linear equations in one variable. Introduction to the equation in two variables. Focus on linear equations of the type ax + by + c=0.Explain 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 lie on a line.

UNIT III: COORDINATE GEOMETRY COORDINATE GEOMETRY (7)

The Cartesian plane, coordinates of a point, names and terms associated with the coordinate plane, notations.

UNIT IV: GEOMETRY

1. INTRODUCTION TO EUCLID'S GEOMETRY (7) Periods

History - Geometry in India and Euclid's geometry. Euclid's method of formalizing observed phenomenon into rigorous Mathematics with definitions, common/obvious notions, axioms/postulates and theorems. The five postulates of Euclid. Showing the relationship between axiom and theorem, for example: (Axiom) 1. Given two distinct points, there exists one and only one line through them. (Theorem) 2. (Prove) Two distinct lines cannot have more than one point in common.

2. LINES AND ANGLES (15) Periods

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, vertically opposite angles are equal.

3. (Motivate) Lines which are parallel to a given line are parallel.

3. TRIANGLES (22) Periods

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 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. (RHS Congruence)

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.

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 is parallel and equal.

5. (Motivate) In a parallelogram, the diagonals bisect each other and conversely.

6. (Motivate) In a triangle, the line segment joining the mid points of any two sides is parallel to the third side and in half of it and (motivate) its converse.

5. CIRCLES (17) Periods

1.(Prove) Equal chords of a circle subtend equal angles at the center and (motivate) its converse.

2.(Motivate) The perpendicular from the center of a circle to a chord bisects the chord and conversely, the line drawn through the center of a circle to bisect a chord is perpendicular to the chord.

3. (Motivate) Equal chords of a circle (or of congruent circles) are equidistant from the center (or their respective centers) and conversely.

4.(Prove) The angle subtended by an arc at the center is double the angle subtended by it at any point on the remaining part of the circle.

5.(Motivate) Angles in the same segment of a circle are equal.

6.(Motivate) If a line segment joining two points subtends equal angle at two other points lying on the same side of the line containing the segment, the four points lie on a circle.

7.(Motivate) The sum of either of the pair of the opposite angles of a cyclic quadrilateral is 180° and its converse.

UNIT V: MENSURATION

1. AREAS (5) Period

Area of a triangle using Heron's formula (without proof)

2. SURFACE AREAS AND VOLUMES (17) Periods

Surface areas and volumes of spheres (including hemispheres) and right circular cones.

5 UNIT VI: STATISTICS & PROBABILITY STATISTICS (15) Periods

Bar graphs, histograms (with varying base lengths), and frequency polygons.

Number System

• Introduction
• Irrational Numbers
• Real numbers and their decimal expansions
• Representing real numbers on the number line
• Operations on real numbers
• Laws of exponents for  real numbers

Polynomial

• Introduction
• Polynomials in one Variable
• Zeros of Polynomial
• Remainder Theorem
• Factorisation of Polynomials
• Algebraic Identities

Coordinate Geometry

• Introduction
• Cartesian System
• Plotting a point in plane of its  coordinates

Linear Equations in Two Variables

• Introduction
• Linear Equations
• Solution of Linear  Equations
• Graph of Linear equations in Two variables
• Equation of lines parallel to x axis and y axis

Introduction to Euclid Geometry

• Introduction
• Euclid Definition ,Axioms and Postulates

Lines and Angles

• Introduction
• Basic Terms and Definitions
• Intersecting and Non Intersecting Lines
• Pair of Angles
• Parallel  Lines and Transversal
• Lines parallel to same line
• Angle Sum Property of Triangle

Triangles

• Introduction
• Congruence of Triangles
• Criteria for congruence of Triangles
• Some Properties of Triangles
• Inequalities in a Triangle

Circles

• Introduction
• Circles and its Related Terms
• Angle Subtended by a chord at a point
• Perpendicular from centre to chord
• Circle through three points
• Equal Chords and their ditances from centre
• Angle subtended by Arc of circle

Construction

• Basic Construction
• Some Construction of Triangles

Heron's Formula

• Introduction
• Area of Triangle by Herons Formula
• Application of Heron's formula in finding the area of quadrilateral

Surface Area and Volume

• Surface area of cuboid and cube
• Surface area of right circular cylinder
• Surface area of right circular cone
• Surface area of sphere
• Volume of cuboid
• Volume of cylinder
• Volume of right circular cone
• Volume of sphere

Statistics

• Collection of data
• Presentation of data
• Graphical representation of data
• Measure of Central tendency

Probability

• Introduction
• Probability

Modules

Number System

25 attachments • 2 hrs

Number System Ncert Text Book

27 pages

Preview

Exercise 1.1

Insert rational number between two number@sonikaanandacademy

insert five rational numbers between 3 / 5 and 4 /5

Preview

Exercise 1.2

Ex 1.2 NCERT Text Book Que 1 Que 2

Exercise 1.2 how to draw an irrational number on a number line@sonikaanandacademy

Concept Base Lecture How to Draw Number line

Exercise 1.3

Terminating and non terminating decimal @sonikaanandacademy

Terminating and non terminating decimal@ sonikaanandacademy

Conversion of recurring decimal to fraction @sonikaanandacademy

How to convert irrational number to rational number @sonikaanandacademy

Ex 1.5

How to add irrational numbers that is how to simplify airrational numbers

how to convert a irrational number to rational number

Test Papers

Test Paper 1

1 page

Preview

Test Paper 2

1 page

Preview

Test Paper 3

2 pages

Preview

MCQ 1

Preview

MCQ 2

Preview

Polynomial

18 attachments • 3 hrs

Polynomials Ncert Text Book

23 pages

Preview

Exercise 2.5

Exercise 2.5 continued part 2 @sonikaanandacademy

Verify Zero of polynomial

Find zero of polynomial

Find unknown quantities

Test Papers

Test Paper 1

1 page

Preview

Test Paper 2

1 page

Preview

Test Paper 3

1 page

Preview

Coordinate Geometry

5 attachments • 33 mins

Coordinate Geometry Ncert Text Book

15 pages

Preview

Coordinate Geometry How to draw graph part 1@sonikaanandacademy

coordinates geometry graph part 2 @sonikaanandacademy

Linear Equations in two Variables

6 attachments • 58 mins

Linear Equations in Two Variables Ncert Text Book

12 pages

Preview

Introduction to Euclid Geometry

2 attachments • 18 mins

Introduction to Euclid Geometry Ncert Text Book

11 pages

Preview

Lines and Angles

19 attachments • 2 hrs

Lines and Angles Ncert Text Book

20 pages

Preview

Exercise 6.1

Exercise 6.2

Exercise 6.3

Exercise 6.3. Que 1 # Sonikaanand academy

SUMMARY

Triangles

18 attachments • 1 hrs

Triangles Ncert Text Book

26 pages

Preview

Exercise 7. 1 Que 3 @sonikaanandacademy

Exercise 7.2

Exercise 7.3

Exercise 7.4

Concept Base Lectures

Circles

13 attachments • 50 mins

Circles Ncert Text Book

20 pages

Preview

Exercise 10.2

Exercise 10.4

Exercise 10 .4 Que 2 @sonikaanandacademy

Exercise 10.5

Exercise 10.5 Que 5 and Que 6 @sonikaanandacademy

Construction

8 attachments • 23 mins

Construction Ncert Text Book

9 pages

Preview

Exercise 11.1

How to draw a perpendicular bisector@sonikaanandacademy

Exercise 11.2

when difference of two sides are given ||construction @sonikaanandacademy

when sum of two sides are given @sonikaanandacademy

Herons Formula

11 attachments • 1 hrs

Heron's Formula Ncert Text Book

11 pages

Preview

Concept Base Lecture

Exercise 12.1

Exercise 12. 2

Exercise 12.2 Que 1 To Que 5 @sonikaanandacademy

Exercise 12.2 Que 1 and Que 2 @sonikaanandacademy

Exercise 12.2 Que 6 ,Que 7 ,Que 8@sonikaanandacademy

Surface Area and Volume

47 attachments • 2 hrs

Surface Areas and Volumes Ncert Text Book

30 pages

Preview

Exercise 13.1

Exercise 13.2

Exercise 13 .2 Que 10 @sonikaanandacademy

Exercise 13.3

Exercise 13.4

Exercise 13.4 Que 1 to Que 6 @Sonika

Exercise 13 .4 Que 7 , Que 8 , Exercise 1.3 Que 9 @sonikaanandacademy

Exercise 13.5

Exercise 13.6

Exercise 13 .6 Que 1 @sonikaanandacademy

Exercise 13.7

Exercise 13.7 Que 6‎@Sonika Anand Academy

Exercise 13.7 Que 9 @ Sonika Anand Academy

Exercise 13.8

Statistics

6 attachments • 45 mins

Statistics Ncert Text Book

33 pages

Preview

How to drwa a Bar graph @sonikaanandacademy

how to draw a frequency polygon ||statistics @sonikaanandacademy

How to find mean median mode @sonikaanandacademy

Probability

2 attachments • 10 mins

Probability Ncert Text Book

15 pages

Preview

Exercise 15 .1 class 9 Maths @sonikaanandacademy

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