If diagonals of a cyclic quadrilateral are diameters of the circle through the vertices of the quadrilateral, prove that it is a rectangle

If the diagonals of a cyclic quadrilateral intersect at the centre of a circle , then the quadrilateral is "_______________" .

A diagonal of a quadrilateral is a line segment that joins two ........ vertices of the quadrilateral.

ABCD is a cyclic quadrilateral (see the given figure). Find the angles of the cyclic quadrilateral.

If bisectors of opposiste 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.

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.

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.

A diagonal of a quadrilateral is a line segment that joins two __________ vertices of the quadrilateral.

If the diagonals of a quadrilateral bisect each other at right angle, prove that the quadrilateral is a rhombus.