Students are often unsure why angles in the same segment of a circle have to be equal. Colin Foster explains how to make it ...

Circle theorems are properties that are true for all circles, regardless of their size. There are six theorems to learn and recognise. Questions can have a combination of theorems. It is important ...

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