Question

find the unknown marked Angles in the given figure​

Answer 1

Answer:

2b+50=180

2b=130

b=130/2

b=65

Answer 2

Angle one= 50°

second two angles are=b°

by angle sum property in triangle

angle one + angle two + angle three =180

50°+ b+b=180

2b=130

b=65°

angle b=65°

hope it will help you:)