In △ABC, O is the incentre and ∠BOC = 135º. The measure of ∠BAC is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 90º
By using the angle bisector theorem we get,
∠BOC = 90 + 1/2 of ∠BAC.
135 = 90 + ∠BAC\2
∠BAC = 90°.