Question

An angle is half of its supplement find the measurement of the angle?

Answer 1

Let one of the angles be "x"
Then its suppliment angle be "180-x"

※"An angle is half of suppliment."
That is:-

x = (1/2)(180-x)
2x = 180-x
3x = 180
x = 180/3 = 60°

therefore,
measurement of angle = 60°