Outline
Circle Theorems
A summary of the 7 basic circle theorems.
![Circle Theorems](https://www.geogebra.org/resource/BQVdYCuq/z4uVdDIxsWHCzM8R/material-BQVdYCuq-thumb.png)
Table of Contents
Theorem 1 Chord/radius
Theorem 2 Angle subtended by a chord at centre and circumference
Theorem 3 Angles subtended by the same chord (bowtie)
Theorem 5 Exterior angle of a cyclic quad
Theorem 4 opposite angles of a cyclic quadrilateral
Theorem 6 Tangent/radius
Theorem 7 Two tangents from common point
Theorem 8 Tangent/chord