Find the perimeter of the quadrilateral that circumscribes this circle.

Find the perimeter of the adjoining quadrilateral

In figure if Quadrilateral PQRS circumscribes a circle then PD+QB=

What is the perimeter of a square which is circumscribing a circle of radius x cm?

Prove that the opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centres of the circle.

Find the perimeter and area of the quadrilateral ABCD in which AB=21cm

Prove that opposite sides of a quadrilateral circumscribing a circle subtend supplementary angles at the centre of the circle.