0580/22 May/Jun 2026, Question 11: Angles in regular polygons
Cambridge IGCSE Mathematics 0580 · Paper 22 (Extended) · Non-calculator · 2 marks
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The question, in short
Each interior angle of a regular polygon is 140°. How many sides does it have?
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Exterior angle = 180° − 140° = 40°
- 2Number of sides = 360 ÷ 40 = 9
Answer9
Stuck on a step? Read the free lesson: Interior and Exterior Angles of Polygons
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