A designer creates a regular polygonal clock with each internal angle 150°. How many sides does it have?
Show answer & explanation
Correct answer: B
Explanation
Given:
Each interior angle = 150°
Formula:
Each interior angle = ((n − 2) × 180) / n
150 = ((n − 2) × 180) / n
150n = 180n − 360
360 = 180n − 150n
360 = 30n
n = 360 / 30
n = 12