The diagram shows a regular octagon, ABCDEFGHABCDEFGHABCDEFGH, and an equilateral triangle, GHIGHIGHI.
The lines FG FG\,FG and IG IG\,IG are both sides of another regular polygon, PPP.
How many sides does polygon P P\,P have?
You must show how you got your answer.
44 exam-style questions on Edexcel GCSE Maths Angles in Polygons. Each one has a worked solution and a mark scheme showing where the marks go.