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

Prove Equal chords of a circle subtend equal angles at the centre.

Prove Equal chords of congruent circles subtend equal angles at the centre.

Find the perimeter of the quadrilateral that circumscribes this circle.

The lengths of three consecutive sides of a quadrilateral circumscribing a circle are 4 cm, 5cm, and 7cm respectively. Determine the length of the fourth side.

Prove that the parallelogram circumscribing a circle is a rhombus.

Prove that the parallelogram circumscribing a circle is a Rhombus.

Prove that the parallelogram circumscribing a circle is a rhombus.

Prove that equal chords of congruent circles subtend equal angles at their centre.

Prove that equal chords of congruent circles subtend equal angles at their centre.

Prove that the rectangle circumscribing a circle is a square