1.

If A , B, C are three points on a circle with centre O such that ∠AOB = 90° and ∠BOC = 120°, then ∠ABC =(a) 60°(b) 75°(c) 90°(d) 135°

Answer» If A , B, C are three points on a circle with centre O such that ∠AOB = 90° and ∠BOC = 120°, then ∠ABC =



(a) 60°



(b) 75°



(c) 90°



(d) 135°


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