Circle Theorems

  • Created by: DJSalt
  • Created on: 02-03-17 16:08

Circle theorem 1

Angles at the centre are double the angle at the circumference 

1 of 8

Circle theorem 2

Angles in a semi-circle are 90 degrees. 

2 of 8

Circle theorem 3

Angles in the same segment are equal

3 of 8

Circle theorem 4

Opposite angles in cyclic quadrilaterals add up to 180 degrees

4 of 8

Circle theorem 5

Lengths of tangents are equal if from the same point

5 of 8

Circle theorem 6

The angle between the radius and the tangent is 90 degrees 

6 of 8

Circle theorem 7

The angle between the tangent and chord is equal to the angle in the alternate segment. This is called alternate segment theorem.

7 of 8

Circle theorem 8

Radius may bisect the chord which can produce a right angle. 

8 of 8


No comments have yet been made

Similar Mathematics resources:

See all Mathematics resources »See all Circle Theorems resources »