Question

Two angles are supplementary. if one angle measures 72 degrees, what does the other measure?

Answer 1

Answer:   108 degrees

Work Shown:

Let x and y be supplementary angles, which means they add to 180 degrees.

x = 72 is one of the angles. We don't know the other angle yet, so lets just keep it at y.

x+y = 180

72+y = 180 ..... plug in x = 72

72+y-72 = 180-72 ..... subtract 72 from both sides

y = 108