0580/12 Feb/Mar 2023, Question 12: Interior and Exterior Angles of Polygons
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 2 marks
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The question, in short
Calculate the size of a single interior angle in a regular polygon with 9 sides.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 2 marks
- 1Exterior angle = 360 ÷ 9 = 40°
- 2Interior angle = 180 − 40 = 140°
Answer140
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