Question

A regular shape has 20 sides. What is the size of each interior angle?​

Answer 1

Each exterior angle of a regular polygon of 20 sides = 360/20 = 18 deg.

Each interior angle of a regular polygon of 20 sides = 180 - 18 = 162 deg.

Total sum of the 20 interior angles of the regular polygon = 162*20 = 3240 deg.

Answer 2

Answer:

The measure of each interior angle of a regular 20-gon is 162°.