If two angles are supplementary and one of them is 30, what is the measurement of the second angle?

Supplementary angles are two angles that add up to 180 degrees. If one of the angles is 30 degrees, you can find the measurement of the second angle by subtracting 30 from 180.

So, the calculation would be:

180 degrees – 30 degrees = 150 degrees

Therefore, the measurement of the second angle is 150 degrees.