NCERT Solutions for Class 8 Maths Chapter 3 Understanding Quadrilaterals Exercise 3.1

Examples From Chapter 3 Understanding Quadrilaterals

Ex.1 What is the maximum exterior angle for a polygon?

Soln: In an equilateral triangle, every exterior angle 120⁰. The maximum value of the exterior angle possible is 120⁰.  We know that each exterior angle of a regular polygon is equal to 360/number of sides of the polygon.

Hence 360/3 =120.

Ex. 2 State True or False

1. A polygon with at least one angle more than 180⁰ is called a convex polygon.
2. The sum of all the interior angles of a convex polygon of sides 7 is 900°.
3. The angle sum of a convex polygon with 8 sides is 1080°.

Soln. 

1. False
2. True
3. True