0580/11 May/Jun 2021, Question 11: Interior and Exterior Angles of Polygons
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks
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The question, in short
Name a five-sided polygon and calculate the interior angle of a regular polygon with 18 sides.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Part (a) · 1 mark
Give the mathematical term for a polygon having 5 sides.
- 1A 5-sided polygon is a pentagon
AnswerPentagon
Part (b) · 2 marks
Calculate the size of one interior angle in a regular 18-sided polygon.
- 1Exterior angle = 360 ÷ 18 = 20°
- 2Interior angle = 180 − 20 = 160°
Answer160
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Also searched as: 0580/11/M/J/21 · 0580_s21_qp_11 · 0580 s21 11 · question 11.
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