# CBSE Class 9 Maths

### Number System

What is Number Line

Find Number between Two Numbers - I

Find n Number between Two Numbers

Square Root of any Real Number

Represent Root 2 on Number Line

Find Square Root of 3.5

Locate Under Root 3 on Number Line

Rational and Irrational Numbers

Decimal to Division form of Rational Number

### Linear Equations in Two Variables

Identities in Maths - Part 1

Identities in Maths - Part 2

### Polynomials

What is Polynomial

Expression in Maths

Term, Factor and Coefficient in an Expression

Degree of Polynomial

Zero of Polynomial

Factor Theorem

Remainder Theorem in Polynomial

### Lines and Angles

Angles - Basic Terms and Definitions

Vertically Opposite Angles are Equal

Parallel Lines and Transversal

### Triangles

Sum of Angles in Triangle is 180

Rules of Congruence in Triangles

Opposite Angle in Isosceles Triangle

### Quadrilteral

What is Perimeter and Perimeter of Square

### Surface Area and Volume

Surface Area and Volume of Cube

Surface Area of Cylinder