Q1 of 24 Page 296

O is the orthocenter of ABC; if ∠BAC = 40° the ∠BOC is

Given:



As we know,


If O is orthocenter Δ ABC then sum of ∠BOC and ∠BAC is180°:


i.e. ∠BOC + ∠BAC =180°:


∠BOC =180° - ∠BAC


⇒ ∠BOC = 180° - 40°


⇒ ∠BAC = 140°


Option (B) is correct.

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