4024/11 Oct/Nov 2021, Question 9: Interior and Exterior Angles of Polygons
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
A regular polygon has interior angle 156°. Find 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°
- 2n = 360 ÷ 24 = 15
Answer15
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