Question

If O is the orthocentre of ΔABC , if∠ BOC = 1050 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 1050 +∠ BAC =180 0 or ∠ BAC =180 0 -1050 = 750

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