(a) The equilateral triangle being a regular polygon of 3 sides has the least measure of an
interior angle of 60°
∵ Sum of all the angles of a triangle = 180°
∴ x+x+x=180°
⇒ 3x = 180°
⇒ x=60°
(b) By (a), we can observe that the greatest exterior angle is 180°-60°=120°.

Class 8 Maths Chapter 3 Exercise 3.2 Solution in Video

for more answers vist to:
https://www.tiwariacademy.com/ncert-solutions/class-8/maths/chapter-3/