A,B,C A, B, C\,A,B,C and D D\,D are points on the circumference of a circle, centre OOO.
Draw on this
Prove that angle ABD ABD\,ABD and angle ACD ACD\,ACD are equal.
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.