∠A + $$\frac{1}{2}$$ ∠B + ∠C = 140°, then ∠B is :
A. 50°
B. 80°
C. 40°
D. 60°
Answer: Option B
Solution(By Examveda Team)
According to question,∠A + $$\frac{1}{2}$$ ∠B + ∠C = 140° . . . . . . . . (i)
As we know that
∠A + ∠B + ∠C = 180° . . . . . . . . . (ii)
Compare equation (i) and (ii)
$$\frac{1}{2}$$ ∠B = 40°
∴ ∠B = 80°
This Question Belongs to Arithmetic Ability >> Triangles
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