- Home >
- GCSE >
- Mathematics >
- GCSE Circle Theorems

# GCSE Circle Theorems

Teacher recommended

- Subject: Mathematics
- Level: GCSE
- Exam board: All boards
- Author: Naomi Arnold
- Year created: 2012

GCSE circle theorems; good detailed revision notes with a couple of exam style questions at the end.

- join
**1,350,250**students and teachers - access over
**179,000**learning resources - unlimited access for
**£6.99**a month

## More Mathematics resources:

## Other slides in this set

### Slide 2

Here's a taster:

90°

Angles in a Semi-circle 90°

Angles in semicircle = 90 degrees.

OR

Angles subtended by a diameter = 90

degrees.…read more

### Slide 3

Here's a taster:

Angles in the Same Sector

These angles same

These angles same size!

size!

Angles in the same segment are equal.…read more

### Slide 4

Here's a taster:

Cyclic Quadrilaterals

A+C=180

B+D=180

Opposite angles in a Cyclic

Quadrilateral (four-sided shape with its B

corners touching the edge of a circle)

add to 180

A

C

D…read more

### Slide 5

Here's a taster:

Centre Angle/Circumference Angle

A Angle A is half of angle B.

The angle at the

circumference is half of the

angle at the centre.

OR

B The angle at the centre is

double the angle at the

circumference.

Origin (Centre)…read more

### Slide 6

Here's a taster:

Alternate Segment Rule

This applies where

Angle A = Angle B

there is a triangle in a

Angle C = Angle D circle and one corner

A is touching a tangent

to the circle.

C

Angles in alternate

segments are

equal.

B D…read more

Fri 27th December, 2013 @ 18:26