0580/42 May/Jun 2025, Question 15: Interior and Exterior Angles of Polygons
Cambridge IGCSE Mathematics 0580 · Paper 42 (Extended) · Calculator · 2 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
A regular polygon has interior angle 172°; 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 − 172 = 8°
- 2Number of sides = 360 ÷ 8 = 45
Answer45
Stuck on a step? Read the free lesson: Interior and Exterior Angles of Polygons
Practise more interior and exterior angles of polygons questions
Real 0580 past-paper questions, marked on your working like the exam, with a worked solution for every part.
Practise free on LemmaraMore past-paper questions on interior and exterior angles of polygons
Also searched as: 0580/42/M/J/25 · 0580_s25_qp_42 · 0580 s25 42 · question 15.
Lemmara is an independent study tool, not affiliated with or endorsed by Cambridge International Education. The worked solutions are Lemmara’s own.