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In a triangle ABC, ∠A = 70°, ∠B = 80° and D is the incenter of ΔABC, ∠ACB = 2x° and ∠BDC = y°. The values of x and y, respectively are:

A. 15°, 130°

B. 15°, 125°

C. 35°, 40°

D. 30°, 150°

Answer: Option B

Solution(By Examveda Team)

Triangles mcq solution image
∠C = 180 - (∠A + ∠B)
∠C = 180 - 150
2x = 30
x = 15°
Triangles mcq solution image
∠BDC = 90° + $$\frac{1}{2}$$ ∠A
∠BDC = 90° + $$\frac{1}{2}$$ × 70°
∠BDC = 90° + 35°
∠BDC = 125°
So value of x and y are = 15°, 125°

This Question Belongs to Arithmetic Ability >> Triangles

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