JAMB Mathematics 1993 Question 26

Question 26

Angles and Polygons

A regular polygon has 150° as the size of each interior angle. How many sides has the polygon?

  1. A.12
  2. B.10
  3. C.9
  4. D.8
Show the answer and explanation

Answer: A (12)

Explanation

Each exterior angle is 180° − 150° = 30°, and the exterior angles add up to 360°, so there are 360 ÷ 30 = 12 sides.