Cyclic Quadrilateral in Circle Geometry

Cyclic Quadrilateral is inscribed into a circle, whose vertices all lie on a circle.
The properties of Cyclic Quadrilateral in Circle Geometry are;
1. Opposite angles in a cyclic quadrilateral supplementary.
2. Exterior angle and its opposite angle are equal.

Worked Examples of Cyclic Quadrilateral

Cyclic Quadrilateral in Circle Geometry
(a)    Prove that \(FADG\) is a cyclic quadrilateral.


(b)    Prove that \(GA\) is a tangent to the circle through \(A\), \(B\), \(C\) and \(D\).

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