Home

First page

Theorem 1

Theorem 2

Theorem 3

Theorem 4

Theorem 5

Theorem 6

Theorem 7

The Seven Theorems

## Angle at centre and angle at circumference
First circle theorem:
You can use the cursor to move point C, and hence to alter angle α. If you need them, the seven circle theorems here Tim Devereux, Created with GeoGebra |