Circle Theorems
4.0(1)
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Last updated 1:11 PM on 2/25/24
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7 Terms
1
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The angle subtended by a chord at the centre is twice the size of the angle subtended by the same chord at the circumference.
2
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The angles subtended by a chord in the same segment are equal.
3
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The angle of a semi-circle is a right angle.
4
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The opposite angles of a cyclic quadrilateral add up to 1800
5
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The angle between a tangent and a radius at the point of contact is a right angle.
6
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The two tangents drawn to a circle from a point are equal in length.
7
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The angle between a chord and a tangent is equal to the angle subtended by the same chord in the alternate segment.
