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This presentation covers 9 Euclidean geometry theorems, proofs and examples.

1) A perpendicular line from the centre of the chord bisects the chord
2) Angle at the centre = 2x angle at the circumference
3) Angle in a semi-circle = 90 degrees
4) Arc (Chord) subtends equal angles
5) Opposite angles Cyclic Quadrilateral are supplementary
6) Exterior Angles of a cyclic quadrilateral are equal to the opposite interior angle
7) Tangent Perpendicular to radius
8) Two tangents from the same point are equal in length
9) Tan-chord theorem.

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