1.

Two lines AB and CD intersect at O. If ∠AOC + ∠COB + ∠BOD = 270°, then ∠AOC =(a) 70°(b) 80°(c) 90°(d) 180°

Answer» Two lines AB and CD intersect at O. If ∠AOC + ∠COB + ∠BOD = 270°, then ∠AOC =



(a) 70°



(b) 80°



(c) 90°



(d) 180°


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