A building has a regular decagon-shaped window. What is the internal angle between any two adjacent sides?
Show answer & explanation
Correct answer: B
Explanation
Given:
Regular decagon, n = 10
According to the formula:
Each interior angle = ((n − 2) × 180) / n
Each interior angle = ((10 − 2) × 180) / 10
= (8 × 180) / 10
= 1440 / 10
= 144°