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    Question

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

    1350 then what is the measure of  ∠ BAC?
    A 35° Correct Answer Incorrect Answer
    B 50° Correct Answer Incorrect Answer
    C 65° Correct Answer Incorrect Answer
    D 45° Correct Answer Incorrect Answer

    Solution

    If O is the orthocentre of ΔABC,  then ∠ BOC + ∠ BAC = 180 0  or 1350   + ∠ BAC  = 180 0    or ∠ BAC = 180 0   - 1350     = 450  

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