Circle Theorems

Question	Answer
Image: 76ee366a-0041-44c0-b437-4aa3efaa0071 (image/png)	A tangent and a radius meet at 90°.
Image: be26abdf-00b6-4a25-84fa-94884c94b989 (image/png)	Two Radii make an Isosceles Triangle.
Image: 28f15135-374a-44ef-af8c-cc0c6fa39f60 (image/png)	The perpendicular bisector of a chord passes through the centre of the circle.
Image: 8be3598a-6ce1-4258-ad58-c41937a6ab0d.gif (image/gif)	The angle at the centre of a circle is twice the angle at the circumference.
Image: e27e504b-4009-40a7-b815-d0947297b370 (image/png)	The angle in a semicircle is 90°.
Image: a157c2c4-bbf9-4340-9143-c921ce2614f8 (image/png)	Angles in the same segment are equal.
Image: 8f9316cb-2376-44cb-9ff6-d1b4dd5da428 (image/png)	Opposite angles in a cyclic quadrilateral add up to 180°.
Image: ebbf8e50-1047-47da-ba65-df1bfa87fb34 (image/png)	Tangents from the same point are the same length.
Image: 7e2b3a80-8fe5-4061-b094-6893eafdc651 (image/png)	The angle between a tangent and a chord is always equal to the angle in the opposite segment.

Resource summary

	Created by candy floss over 7 years ago