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Circle theorems - Higher - OCRCircle theorems - Higher

Circles have different angle properties described by different circle theorems. Circle theorems are used in geometric proofs and to calculate angles.

Part ofMathsGeometry and measure

Circle theorems - Higher

Explore updated revision resources for GCSE Maths: Circle theorems, with step-by-step slideshows, quizzes, practice exam questions, and more!

Circles have different angle properties, described by . There are seven circle theorems.

An important word that is used in circle theorems is .

Subtending

An angle is created by two lines.

Circle with arc CD and unknown angle formed from points C and D

The angle in between the two lines is subtended by the between C and D.