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.

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

The diagonals of a quadrilateral ABCD are perpendicular.Show that the quadrilateral, formed by joining the mid-points of its sides,is a rectangle.

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.