If the opposite angles of any quadrilateral be supplementary, then the vertices of the quadrilateral are concyclic.

Fill in the blanks: If the opposite angles of a quadrilateral are supplementary then the vertices of the quadrilateral are____.

The opposite angles of a cyclic quadrilaterals are supplimentary

Prove that opposite angles of a cyclic quadrilateral are supplementary

The opposite vertices of the quadrilateral PQRS are

The opposite angles of a cyclic quadrilateral are ……………

Prove that the opposite angles of a cyclic quadrilateral are suplemenary.

Both the pairs of opposite angles of a quadrilateral are equal and supplementary. Find the measure of each angle.

If the opposite sides of a quadrilateral are equal, prove that the quadrilateral is a parallelogram.

If the sum of the pairs of opposite angles of a quadrilateral is 180^@ , then the quadrilateral is