Class 7 Maths NCERT Solutions for Chapter – 6 The Triangle and its Properties Ex – 6.2

The Triangle and its Properties

 Question 1.
Find the value of the unknown exterior angle x in the following diagrams :
NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties 6
Solution:
Since, in a triangle an exterior angle is equal to the sum of the two interior opposite angles, therefore,

  1. x = 50°+ 70° = 120°
  2. x = 65°+ 45° = 110°
  3. x = 30°+ 40°= 70°
  4. x = 60° + 60° = 120c
  5. x = 50° + 50° = 100c
  6. x = 30°+ 60° = 90°

Question 2.
Find the value of the unknown interior angle x in the following figures :
NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties 7
Solution:
We know that in a triangle, an exterior angle is equal to the sum of the two interior opposite angles. Therefore,
NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties 8