Question
If O is the orthocentre of ÎABC , if â BOC = 120
0 then what is the measure of â BAC?Solution
If O is the orthocentre of ÎABC, then â BOC + â BAC = 180 0 or 120 0  + â BAC  = 180 0   or â BAC = 180 0  - 120 0   = 600 Â
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