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WAEC Mathematics 2014 Question 47

Question 47

Angles and Polygons

Each exterior angle of a polygon is 30°. Calculate the sum of the interior angles.

  1. A.540°
  2. B.720°
  3. C.1080°
  4. D.1800°
Show the answer and explanation

Answer: D (1800°)

Explanation

n = 360 ÷ 30 = 12 sides. Sum = (12 − 2) × 180° = 1800°.