Graham Burnby-Crouch – Resources – GeoGebra

Theorem 8:alternate segment theorem
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Graham Burnby-Crouch
Theorem 7:opposite angles in cyclic quadrilateral add up 180
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Graham Burnby-Crouch
Theorem 6: The angle in a semicircle is a right angle
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Graham Burnby-Crouch
Theorem 5:Angles from same arc in the same segment are equal
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Graham Burnby-Crouch
Theorem 4: angle at centre twice angle on circumference
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Graham Burnby-Crouch
Theorem 3: The two tangents to a circle are equal in length
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Graham Burnby-Crouch
Theorem 2: tangent and radius always meets at right angles
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Graham Burnby-Crouch
Circle theorem 1: line from centre to midpoint of a chord
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Graham Burnby-Crouch