Back to Class VII Mathematics
Classes VII & IX Mathematics

Chapter 5: Lines and Angles

Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.

Class Syllabus Selection

This topic is taught in multiple grades. Switch classes to see specific curriculum details:

Example 1

Finding Supplementary Angle

Find the supplementary angle of 115 degrees.
sin θcos θθ

Calculation Steps:

  1. 1Recall supplementary angles sum to 180 degrees.
  2. 2Subtract given angle from 180: 180 - 115.
  3. 3Calculation: 180 - 115 = 65 degrees.
Solution65 degrees