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This question belongs to Arithmetic Ability Triangles
Triangles
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ABC is a triangle. The bisectors of the internal angle ∠B and external angle ∠C intersect at D. If ∠BDC = 50°, then ∠A is

Answer & Solution
Correct Answer: Option A
According to question,
Triangles mcq solution image
Given :
∠D = 50°
∠BAC = 2∠BDC (property)
∴ ∠BAC = 2 × 50°
∠BAC = 100°
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