P P\,P and R R\,R are points on a circle, centre OOO. PQ PQ\,PQ and RQ RQ\,RQ are tangents to the circle.
Prove that triangle OPQ OPQ\,OPQ is congruent to triangle ORQORQORQ.
20 exam-style questions on AQA GCSE Maths Congruent Triangles. Each one has a worked solution and a mark scheme showing where the marks go.