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

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

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

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

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

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

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

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

Theorem 10.1 : Equal chords of a circle subtend equal angles at the centre

If a Quardlateral is circumscribed of a circle and angle AOB is 135^(@) find angle COD . O is the centre of circle

Consider the following statements 1. the opposite angles of a cyclic quadrilateral are supplementary. 2. Angle subtended by an arc at the centre is doubled the angle subtended by it any point on the remaining part of the circle. Which one of the following is correct in respect of the above statements