E E\,E and F F\,F are points on a circle with centre CCC. ED ED\,ED and FD FD\,FD are tangents to the circle.

Prove that triangle CED CED\,CED is congruent to triangle CFDCFDCFD.
Practise Edexcel GCSE Maths Congruent Triangles with exam-style questions for Foundation and Higher tier. 28 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.