## Cyclic Quadrilaterals

Cyclic Quadrilaterals opposite angles of a cyclic quadrilateral are equal In the diagram, 0 is the centre of the circle and AB║AD and BC meet at P. Prove: a. CP = DP b. DABP is isosceles c. OAPC is a cyclic quadrilateral. a. ∠PCD = ∠ABC (corresponding [...]