The diagram shows a regular pentagon, ABCDEABCDEABCDE, and a square, EDFGEDFGEDFG.
The lines CD CD\,CD and DG DG\,DG 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.