9th grade math lessons are planned and introduce in different activities. 9th grade math help is provided for the 9th grade students in all segments to cover all the math lesson plans which are categorized into Arithmetic, Algebra, Geometry and Mensuration.

All types of solved examples on different topics are explained along with the step-by-step solutions. 9th grade math practice sheets are arranged in such a way that students can learn math while practicing math problems.

Keeping in mind the mental level of student in ninth grade, every efforts has been made to introduce new concepts in a simple and easy language, so that the students can understand the problems easily.

The difficulty level of the 9th grade math problems has emphasized the theoretical as well as the numerical aspects of the mathematics course. Each topic contains a large number of examples to understand the applications of concepts.

To get prepared for 9th grade math test or exams students need to learn graphing lines on the coordinate plane, solving literal equations, compound inequalities, graphing inequalities in two variables, multiplying binomials, polynomials, factoring techniques for trinomials, solving systems of equations, algebra word problems, variation, rational expressions, rational equations, graphs & functions, circles, construction, triangle theorems & proofs, properties of polygons, transformations, trigonometry and etc……

If student follow math-only-math they can improve their knowledge by practicing the worksheets for 9th graders which will help them to score in their exam.

#### Rational Numbers

Rational Numbers

﻿Decimal Representation of Rational Numbers

Rational Numbers in Terminating and Non-Terminating Decimals

Recurring Decimals as Rational Numbers

Laws of Algebra for Rational Numbers

Comparison between Two Rational Numbers

Rational Numbers Between Two Unequal Rational Numbers

Representation of Rational Numbers on Number Line

Problems on Rational numbers as Decimal Numbers

Problems Based On Recurring Decimals as Rational Numbers

Problems on Comparison Between Rational Numbers

Problems on Representation of Rational Numbers on Number Line

Worksheet on Rational Number as Decimal Numbers

Worksheet on Comparison between Rational Numbers

Worksheet on Representation of Rational Numbers on the Number Line

#### Irrational Numbers

Definition of Irrational Numbers

Decimal Representation of Irrational Number

Representation of Irrational Numbers on The Number Line

Comparison between Two Irrational Numbers

Comparison between Rational and Irrational Numbers

Rationalization

Problems on Irrational Numbers

Problems on Rationalizing the Denominator

Worksheet on Irrational Numbers

#### Profit and Loss

Cost Price, Selling Price and Rates of Profit and Loss

Worksheet on Cost Price, Selling Price and Rates of Profit and Loss

Understanding Discount and Mark Up

Successive Discount

Worksheet on Discount and Markup

Worksheet on the application of overhead Expenses

Worksheet on Successive Discounts

### Compound Interest

Introduction to Compound Interest

Formulae for Compound Interest

Worksheet on Use of Formula for Compound Interest

#### Algebra/Linear Algebra

Expansion of Powers of Binomials and Trinomials

Expansion of (a ± b)^2

Expansion of (a ± b ± c)^2

Expansion of (x ± a)(x ± b)

Express a^2 + b^2 + c^2 – ab – bc – ca as Sum of Squares

Completing a Square

Simplification of (a + b)(a – b)

Application Problems on Expansion of Powers of Binomials and Trinomials

Worksheet on Expansion of (a ± b)^2 and its Corollaries

Worksheet on Expanding of (a ± b ± c)^2 and its Corollaries

Worksheet on Expansion of (x ± a)(x ± b)

Worksheet on Completing Square

Worksheet on Simplification of (a + b)(a – b)

Worksheet on Application Problems on Expansion of Powers of Binomials and Trinomials

Expansion of (a ± b)^3

Simplification of (a ± b)(a^2 ∓ ab + b^2)

Simplification of (a + b + c)(a^2 + b^2 + c^2 – ab – bc – ca)

Expansion of (x + a)(x + b)(x + c)

Factorization

Introduction to Factorization

Problems on Factorization by Grouping of Terms

Problems on Factorization of Expressions of the Form a^2 – b^2

Problems on Factorization Using a^2 – b^2 = (a + b)(a – b)

Factorization of a Perfect-square Trinomial

Factorization of Expressions of the Form x^2 + (a + b)x + ab

Factorization of Expressions of the Form ax^2 + bx + c, a ≠ 1

Problems on Factorization of Expressions of the Form x^2 +(a + b)x +ab

Worksheet on Factorization of the Trinomial ax^2 + bx + c

Factorization of Expressions of the Form a^3 + b^3

Factorization of Expressions of the Form a^3 - b^3

Factorization of expressions of the Form a^3 + b^3 + c^3 – 3abc

Factorization of Expressions of the Form a^3 + b^3 + c^3, a + b + c = 0

Miscellaneous Problems on Factorization

Linear Equations

Linear Equation in One Variable

Solution of a Linear Equation in One Variable

Laws of Equality

Method of Solving a Linear Equation in One Variable

Different Types of Problems in Linear Equation in One Variable

Worksheet on Linear Equation in One Variable

Worksheet on Forming of Linear Equations in One Variable

Changing the Subject of a Formula

Subject of a Formula

Change of Subject of Formula

Evaluation of Subject by Substitution

Worksheet on Framing a Formula

Simultaneous Linear equations

Solution of a Linear Equation in Two Variables

Method of Elimination

Method of Substitution

Exponents/Indices

Power of a Number

Laws of Indices

Formation of Quadratic Equation in One Variable

Word Problems on Quadratic Equations by Factoring

Worksheet on Formation of Quadratic Equation in One Variable

Worksheet on Nature of the Roots of a Quadratic Equation

Worksheet on Word Problems on Quadratic Equations by Factoring

#### Geometry and Measurement

Triangles

Medians and Altitudes of a Triangle

Geometrical Property of Altitudes

Properties of Angles of a Triangle

Congruency of Triangles

Criteria for Congruency

Problems on Congruency of Triangles

Any point on the bisector of an angle is equidistant from the arms of that angle

An Altitude of an Equilateral Triangle is also a Median

Bisectors of the Angles of a Triangle Meet at a Point

Application of Congruency of Triangles

Angles Opposite to Equal Sides of an Isosceles Triangle are Equal

Equal Sides of an Isosceles Triangle are Produced, the Exterior Angles angles are equal.

The Three Angles of an Equilateral Triangle are Equal.

Sides Opposite to the Equal Angles of a Triangle are Equal

Three Angles of an Equilateral Triangle are Equal

Problems on Properties of Isosceles Triangles

Problem on Two Isosceles Triangles on the Same Base

Lines Joining the Extremities of the Base of an Isosceles Triangle

Points on the Base of an Isosceles Triangle

Theorem on Isosceles Triangle

Inequalities in Triangles

Greater Side has the Greater Angle Opposite to It

Greater Angle has the Greater Side Opposite to It

The Sum of any Two Sides of a Triangle is Greater than the Third Side

Perpendicular is the Shortest Theorem

Problem on Inequalities in Triangle

Sum Of Any Two Sides Is Greater Than Twice The Median

#### Midpoint Theorem

Converse of Midpoint Theorem

Four Triangles which are Congruent to One Another

Straight Line Drawn from the Vertex of a Triangle to the Base

Midsegment Theorem on Trapezium

Midpoint Theorem on Right-angled Triangle

Equal Intercepts Theorem

Problems on Equal Intercepts Theorem

Midpoint Theorem by using the Equal Intercepts Theorem

Proof By the Equal Intercepts Theorem

#### Similarity

Reduction Transformation

Properties of size Transformation

Similar Triangles

Criteria of Similarity between Triangles

AA Criterion of Similarity

Basic Proportionality Theorem

Converse of Basic Proportionality Theorem

Application of Basic Proportionality Theorem

AA Criterion of Similarly on Quadrilateral

Pythagoras’ Theorem

Converse of Pythagoras’ Theorem

Applying Pythagoras’ Theorem

#### Rectilinear Figures

Rectilinear Figures

Sum of the Interior Angles of an n-sided Polygon

#### Parallelogram

Opposite Sides of a Parallelogram are Equal

Opposite Angles of a Parallelogram are Equal

Diagonals of a Parallelogram Bisect each Other

A Quadrilateral is a Parallelogram if its Diagonals Bisect each Other

Pair of Opposite Sides of a Parallelogram are Equal and Parallel

A Parallelogram whose Diagonals Intersect at Right Angles is a Rhombus

In a Rectangle the Diagonals are of Equal Lengths

A Parallelogram, whose Diagonals are of Equal Length, is a Rectangle

Diagonals of a Square are Equal in Length & they Meet at Right Angles

Diagonals of a Parallelogram are Equal & Intersect at Right Angles

Conditions for Classification of Quadrilaterals and Parallelograms

#### Area

Every Diagonal of a Parallelogram Divides it into Two Triangles of Equal Area

Parallelogram on the Same Base and Between the Same Parallel Lines are Equal in Area

Area of a Parallelogram is Equal to that of a Rectangle Between the Same Parallel Lines

Area of a Triangle is Half that of a Parallelogram on the Same Base and between the Same Parallels

Triangles on the Same Base and between the Same Parallels are Equal in Area

Triangles with Equal Areas on the Same Base have Equal Corresponding Altitudes

Problems on Finding Area of Triangle and Parallelogram

Area of the Triangle formed by Joining the Middle Points of the Sides of a Triangle is Equal to One-fourth Area of the given Triangle

The Area of a Rhombus is Equal to Half the Product of its Diagonals

#### Statistics

Statistics and Statistical Data

Representation of Data

Statistical Variable

Range of the Statistical Data

Frequency of the Statistical Data

Mean of Ungrouped Data

Arithmetic Mean

Word Problems on Arithmetic Mean

Properties of Arithmetic Mean

Problems Based on Average

Properties Questions on Arithmetic Mean

Problems on Median of Ungrouped Data

Worksheet on Mean of Ungrouped Data

Worksheet on Median of Ungrouped Data

Frequency Distribution

Class Interval

Constructing Frequency Distribution Tables

Class Limits

Class Boundaries

Nonoverlapping Class Intervals into Overlapping Class Intervals

### Mensuration

Plane Figures

Perimeter and Area of a Rectangle

Geometrical Properties of a Square

Perimeter and Area of a Triangle

Perimeter and Area of Mixed Figures

Perimeter and Area of Rhombus

Perimeter and Area of Irregular Figures

Perimeter and Area of Regular Hexagon

Area and Circumference of a Circle

Area of a Circular Ring

Area and Perimeter of a Semicircle

Solid Figures

Cube and Cuboid

Solid Figures

Volume and Surface Area of Cuboid

Volume and Surface Area of Cube

Volume and Surface Area of Cube and Cuboid

Volume of Cuboid

Volume of Cube

Cylinder

Cross Section

Cylinder

Hollow Cylinder

Probability

Probability

Random Experiments

Experimental Probability

Empirical Probability

Coin Toss Probability

Probability of Tossing Two Coins

Probability of Tossing Three Coins

Complimentary Events

Mutually Exclusive Events

Mutually Non-Exclusive Events

Conditional Probability

Theoretical Probability

Odds and Probability

Playing Cards Probability

Probability and Playing Cards

Solved Probability Problems

Probability for Rolling Three Dice

#### Basic Trigonometry

Trigonometry: Beginning of trigonometry and invention of trigonometry and how and why trigonometry is important.

Measurement of Trigonometric Angles: In trigonometry learn about the measurement of angles.

Different systems of measurement of angles and their units.

Sexagesimal System: Concept on understanding Sexagesimal System, problems on Sexagesimal System.

Circular System: Concept on understanding Circular System, problems on Circular System.

Radian is a Constant Angle: Proof that radian is a constant angle.

Relation between Sexagesimal and Circular: Learn about the relation between the units of the two systems.

Conversion from Sexagesimal to Circular System: Learn how to convert or express Sexagesimal to Circular System.

Conversion from Circular to Sexagesimal System: Learn how to convert or express Circular to Sexagesimal Systemm.

#### Co-ordinate Geometry

Independent Variables and Dependent Variables

Coordinates of a Point

Rectangular Cartesian Coordinates of a Point

Quadrants and Convention for Signs of Coordinates

Plotting a Point in Cartesian Plane

Coordinate Geometry Graph

Graph of Standard Linear Relations Between x, y

Slope of the Graph of y = mx + c

y-intercept of the Graph of y = mx + c

Drawing Graph of y = mx + c Using Slope and y-intercept

Problems on Plotting Points in the x-y Plane

Problems on Slope and Y-intercept

Worksheet on Plotting Points in the Coordinate Plane

Worksheet on Graph of Linear Relations in x, y