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WAEC Mathematics 2000 Question 25

Question 25

Angles and Polygons

Each side of a regular convex polygon subtends an angle of 30° at its centre. Calculate each interior angle

  1. A.75°
  2. B.150°
  3. C.160°
  4. D.168°
Show the answer and explanation

Answer: B (150°)

Explanation

The central angle equals the exterior angle, 30°, so the interior angle is 180 − 30 = 150°.