In a ΔABC, if the angle bisectors of ∠B and ∠C intersect at point I, and BIC = 110°, what is the measure of ∠A?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 40°.
∠BIC = 110°
∠BIC = 90° + (∠A)/2
⇒ 110° = 90° + (∠A)/2
⇒ 20° = (∠A)/2
⇒ ∠A = 40°