Plz expert give answer of Q18 Share with your friends Share 0 Neha Sethi answered this Dear student We have,∠BOC = 120°We know that angle subtended by an arc at the centre is double the angle subtended by the same arc at any point on the circle.Now, ∠BOC = 2∠BAC⇒120° = 2∠BAC⇒∠BAC = 60°Now, ∠BDC = 180° - 60° = 120° Opposite angles of cyclic quadrilateral are supplementaryNow, ∠CDE + ∠BDC = 180° Linear pair⇒∠CDE + 120° = 180°⇒∠CDE = 60° Regards -1 View Full Answer
