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73482
Circle Theorems
Description
Maths Mind Map on Circle Theorems, created by ak_ on 06/05/2013.
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maths
maths
Mind Map by
ak_
, updated more than 1 year ago
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Created by
ak_
over 11 years ago
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Resource summary
Circle Theorems
Theorems involving subtended angles
Angles subtended on the same arc are equal.
Angle Subtended by a diameter is a right angle
Angles at centre is double the angle at the circumfrences
Cyclic Quadrilaterals
The sum of the opposite angles of a cyclic quadrilateral is 180 degress
Tangents and Chords
A tangent to a circle is perpendicular to the radius.
Tangents to a circle froman external point ot the points of contact are equal in length.
The line joining an external point to the centre of the circle bisects the angle between the tangents
Alternate Segment Theorem
The angle between a tangent and a chord is equal to the angle in the alternate segment.
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