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WAEC Mathematics 1995 Question 41

Question 41

Angles and Polygons

Which of the following angles is an exterior angle of a regular polygon?

  1. A.95°
  2. B.85°
  3. C.78°
  4. D.75°
  5. E.72°
Show the answer and explanation

Answer: E (72°)

Explanation

An exterior angle of a regular polygon must divide 360° exactly. 360° ÷ 72° = 5 (a regular pentagon); none of the others divide 360° exactly.