P,Q P, Q\,P,Q and R R\,R lie on the circumference of a circle with centre OOO. POR POR\,POR is a diameter.
Draw on this
Prove that ∠PQR=90∘\angle PQR = 90^\circ∠PQR=90∘
You must not use any circle theorems in your proof.
19 exam-style questions on AQA GCSE Maths Proof of the Circle Theorems. Each one has a worked solution and a mark scheme showing where the marks go.