4MA1/1F Jun 2021, Question 11: Interior and Exterior Angles of Polygons
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
اقرأ هذا الحل مشروحاً بالعربي ←
The question, in short
Use the square ABCD and regular pentagon CDEFG in the diagram to calculate the size of the angle marked x.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1Interior angle of a regular pentagon = 540 ÷ 5 = 108°
- 2The angle in the square is 90°.
- 3Angles at a point add to 360°: x = 360 − (90 + 108) = 162
Answer162
Stuck on a step? Read the free lesson: Interior and Exterior Angles of Polygons
Practise more interior and exterior angles of polygons questions
Real 4MA1 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: 4MA1 1F June 2021 · 4MA1/1F · 4ma1 jun21 1f · question 11.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.