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    Question

    If O is the orthocentre of ΔABC , if ∠ BOC =

    105 0 then what is the measure of ∠ BAC?
    A 70┬░ Correct Answer Incorrect Answer
    B 60┬░ Correct Answer Incorrect Answer
    C 75┬░ Correct Answer Incorrect Answer
    D 80┬░ Correct Answer Incorrect Answer

    Solution

    If O is the orthocentre of ΔABC, then ∠ BOC + ∠ BAC = 180 0 or 105 0 + ∠ BAC = 180 0 or ∠ BAC = 180 0 - 105 0 = 750

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