Question
If I is the incentre of ΔABC , if ∠BAC = 700
, then what is the measure of ∠BIC?Solution
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If I is the incentre of ΔABC, then ∠BIC = 90 0   + ∠BAC/2  ∠BIC = 90 0   + ∠BAC /2 ∠BIC = 900  + 70/2 ∠ BIC = 900 + 350    ∠BAC = 1250Â
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