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Equality of tangents from a point
 The two tangents drawn from an outside point are always equal in length , so creating an isosceles situation with two congruent right angled triangles

Tangent radius meet at
 90°



Sneaky isosceles formed by

opposite angles of a cyclic quadrilateral =
180°

ANgles in the opposite segment are

Angles in the same segment

Angle at the centre
:)


