Circle Theorems
All of the circle theorems.
- Created by: screechfox
- Created on: 06-04-17 14:55
Angles Subtended On An Arc
An angle subtended by an arc at the center is twice the angle subtended at the circumference.
Angles In The Same Segment
Angles in the same segment are equal.
Cyclic Quadrilaterals
Opposite angles in a cyclic quadrilateral add up to 180°.
Tangents and Radius
The angle between a tangent and a radius is 90°.
Perpendiculars to a Chord
The perpendicular from the center of a circle to a chord bisects the chord.
Alternate Segments
The angle between a tangent and a chord is equal to the angle in the alternate segment.
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