Question  Answer 
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CT1 (image/jpg)

CIRCLE THEOREM 1: The angle subtended at the centre of the circle is twice the angle subtended at the circumference 
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CT2 (image/jpg)

CIRCLE THEOREM 2: The angle in a semicircle is a right angle 
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CT3 (image/jpg)

CIRCLE THEOREM 3: Angles subtended by an arc or chord in the same segment are equal 
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CT4 (image/jpg)

CYCLIC QUADRILATERAL THEOREM: The opposite angles of a cyclic quadrilateral are supplementary (they add up to 180°) 
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CT5 (image/jpg)

Circle Theorem 4: The angle between a tangent and a radius is 90° 
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