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WAEC Mathematics 2026 Question 30

Question 30

Angles and Polygons

The interior angle of a regular polygon is the same as its exterior angle. Find the sum of the interior angles.

  1. A.2°
  2. B.360°
  3. C.4°
  4. D.720°
Show the answer and explanation

Answer: B (360°)

Explanation

Interior = exterior = 90°, so the polygon has 360 ÷ 90 = 4 sides and its angles add to (4 − 2) × 180° = 360°.