What are the Properties of Cyclic Quadrilaterals? Cyclic quadrilateral If all four points of a quadrilateral are on circle then it is called cyclic Quadrilateral. A quadrilateral PQRS is said to be cyclic quadrilateral if there exists a circle passing through all its four vertices P, Q, R and S. Let a cyclic quadrilateral be such that PQ = a, QR = b, RS = c and SP = … [Read more...] about What are the Properties of Cyclic Quadrilaterals?