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JAMB Mathematics 2000 Question 32

Question 32

Angles and Polygons

In a regular polygon, each interior angle doubles its corresponding exterior angle. Find the number of sides of the polygon.

  1. A.8
  2. B.6
  3. C.4
  4. D.3
Show the answer and explanation

Answer: B (6)

Explanation

Interior + exterior = 180° and interior = 2 × exterior, so the exterior angle is 60°. Number of sides = 360° ÷ 60° = 6.