0580/22 Oct/Nov 2021, Question 10: Interior and Exterior Angles of Polygons
Cambridge IGCSE Mathematics 0580 · Paper 22 (Extended) · Calculator · 2 marks
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The question, in short
A regular polygon has interior angle 156°; determine how many sides it has.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Exterior angle = 180 − 156 = 24°
- 2Number of sides = 360 ÷ 24 = 15
Answer15
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