Answer:
X + 50 =180 ( being straight angle)
or, X =180 - 50
X = 130
130°
Step-by-step explanation:
Angles in a straight line are supplementary to each other. Those angles are also called as Linear Pairs. Here , b & 50° are linear pairs.
So ,
b + 50° = 180°
=> b = 180° - 50°
=> b = 130°
