1.

Two straight lines AB and CD cut each other at O. If ∠BOD = 63°, the ∠BOC =A. 63°B. 117°C. 17°D. 153°

Answer»

∠BOD + ∠BOC = 180°(Linear pair)

63° + ∠BOC = 180°

∠BOC = 117°



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