Question

Find the unknown marked angles in the given figures :

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Answer 1

B = 65 as
b+b+50 = 180
2b = 130
b=65

Answer 2

Answer:

∠A=50°

All the angles in a triangle add up to 180°

so, 50°+∠b+∠b=180°

=>50+2b=180

=>2b=180-50

=>2b=130

=>b=130/2

=>∠b=65°

Therefore, angle b is 65°