If chords AB and CD subtend angles at the centre O such that AB = CD, then:
∠AOB = ∠COD
In the adjoining figure, BC is a diameter of a circle with centre O. If AB and CD are two chords such that AB || CD, prove that AB = CD.
In the given figure, BOC is a diameter of a circle with centre O. If AB and CD are two chords such that AB||CD and AB = 10 cm then CD = ?
(a) 5 cm
(b) 12.5 cm
(c) 15 cm
(d) 10 cm