Angle between the internal bisectors of two angles of a triangle ∠B and ∠C is 120°, then ∠A is :

A. 20°

B. 30°

C. 60°

D. 90°

Answer: Option C

Solution(By Examveda Team)

According to question,

Given : ∠BIC = 120°
∠BIC = 90° + $$\frac{1}{2}$$ ∠A
$$\frac{{\angle A}}{2}$$  = (120° - 90°)
$$\frac{{\angle A}}{2}$$  = 30°
∠A = 60°