Question

Class 8
Chapter 3
Understanding Quadrilaterals​

Answer 1

Answer:

a) sum of interior angles of regular polygon with 12 sides = 1800

b) see explanation

Step-by-step explanation:

a) sum of interior angles of regular polygon with 12 sides = (n-2) × 180 = (12-2) × 180 = 10 × 180 = 1800

b) sum of exterior angles of any polygon = 360

2x+4x+3x+x+2x = 360

12x = 360

x= 360/12 = 30

2x = 2×30 = 60

4x = 4× 30 = 120

3x = 3 × 30 = 90

2x = 2×30 = 60