Answer:
B
Step-by-step explanation:
The diagram basically shows three angles that make up a straight line.
We know the angle of a straight line is 180°.
Since there are three angles, Angle 1, Angle 2, and Angle 3 that make up a straight line, we can write:
Angle 1 + Angle 2 + Angle 3 = 180
3x + 4x + 2x = 180
9x = 180
x = 180/9
x = 20
The correct answer is B
