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Proof of the Circle Theorems
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The proof engine

The proof engine

Most circle theorem proofs start the same way: draw the centre OOO and join it to points on the circumference. Equal radii create isosceles triangles, and isosceles triangles create equal base angles.

Proof of the Circle Theorems Lesson

  1. GCSE
  2. /Maths
  3. /Proof of the Circle Theorems

Step-by-step lessons on OCR GCSE Maths Proof of the Circle Theorems. Each one builds up to exam-style questions. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.