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 = 1250
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