The opposite angles of a cyclic quadrilaterals are supplimentary

The sum of either pair of opposite angles of a cyclic quadrilateral is 180^(@) OR The opposite angles of a cyclic quadrilateral are supplementary.

In order to prove 'Opposite angles of a cyclic quadrilateral are supplementary .' (1) Draw a neat labelled figure. (2) Write 'Given ' and 'To prove' from the figure drawn by you.

If bisectors of opposite angles of a cyclic quadrilateral ABCD intersect the circle, circumscribing it at the points P and Q, prove that PQ is a diameter of the circle.

Theorem 10.11 : The sum of either pair of opposite angles of a cyclic quadrilateral is 180º.

If two opposite sides of a cyclic quadrilateral are equal,then the other two sides are parallel.

If two opposite sides of a cyclic quadrilateral are equal; then the other two sides are parallel.

If the two sides of a pair of opposite sides of a cyclic quadrilateral are equal,prove that its diagonals are equal.

Definition of Cyclic quadrilateral