What is a Quadrilateral? A quadrilateral is a closed figure with four sides and four angles. The sum of all angles in a quadrilateral is always 360°. 2. Types of Quadrilaterals (Based...
What is a Triangle? A triangle is a closed figure with three sides and three angles. The sum of all three angles in a triangle is always 180°. Triangles are the simplest polygon. 2....
What is a Polynomial? A polynomial is an algebraic expression made up of one or more terms. Each term is a combination of numbers and variables. Polynomials are used in algebra, graphs,...
Class 9 Mathematics – Circles & Coordinate Geometry Notes (Conceptual) 1. Circles Definition A circle is a set of all points in a plane that are at a fixed distance from a fixed point called...
What is a Number System? A number system is a way to represent numbers. Different number systems are used in daily life, computers, and mathematics. 2. Types of Numbers Natural Numbers (N) Counting...