Mathematics

Rays and angles

किरणें और कोण

In this Class 9 Mathematics topic from the chapter “Lines and Angles,” students learn how a ray is formed from an endpoint and extends endlessly in one direction, and how two rays with a common endpoint form an angle. They identify and compare acute, right, obtuse, straight, reflex, and complete angles, measure angles in degrees, and represent them using standard notation. The topic also develops understanding of adjacent angles, linear pairs, and vertically opposite angles, helping students reason about angle relationships in diagrams and solve related problems accurately.