Question

Each interior angle of a regular decagon is 

A. 60° 

B. 120° 

C. 144° 

D. 180°

Answer 1

In Regular Decagon, all sides are of same size and measure of all interior angles are same. 

The sum of interior angles of decagon is 

= (n – 2) × 180° [n is number of sides of polygon)] 

= (10 – 2) X 180° 

= 1440° . 

Each interior angle = 1440/10 

= 144°