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Incentre of ΔABC is I. ∠ABC = 90° and ∠ACB = 70°. Then ∠BIC is
Answer & Solution
Correct Answer:
Option
B
∵ Sum of all angles of a triangle = 180°
So, ∠BAC = 180° - (90° + 70°) = 20°
So, ∠BIC = 90° + $$\frac{1}{2}$$∠A
∠BIC = 90° + $$\frac{1}{2}$$ × 20°
∠BIC = 100°
So, ∠BAC = 180° - (90° + 70°) = 20°
So, ∠BIC = 90° + $$\frac{1}{2}$$∠A
∠BIC = 90° + $$\frac{1}{2}$$ × 20°
∠BIC = 100°
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