OM is common to both triangles. OMA and OMB are both right angles. Triangles OAM and OBM are congruent, so it follows that \(AM=MB.\) Therefore, M is the midpoint of AB, and the chord has been ...

Circle theorems are used in geometric proofs and to calculate angles. Transformations - Edexcel Transformations change the size or position of shapes. Congruent shapes are identical, but may be ...