# Circle Theorem 1

- Author:
- Mr E. Bissoon

- Topic:
- Circle

## Theorem 1

The angle at the centre of a circle is twice the angle at the circumference of the same arc.
In plain terms:
2( + ) = +
Angle is twice that of and Angle is twice that of
The Angle AOB is twice that of the angle at the circumference from the Arc of A and B.