Question

Can equal chords of a circle subtend equal angles at the centre ? If so,

observe that, if the angles subtended by the chords of a circle at the centre

are equal, then chords are equal.​

Answer 1

️In ∆AOB and ∆COD,

OA = OC [each equal to r]

OB = OD [each equal to r]

AB = CD [given]

∆AOB ~= ∆COD [by SSS - congruence]

Hence, /_AOB = /_COD