Question

∠x and∠y are supplementary angles∠y measures 108 degrees.
What is the measure of ∠x?

Answer 1

72°

Explanation:

Supplementary angles are those that add up to 180 degrees. Here, since we know that x and y are supplementary, we can add them together and set them equal to 180:

x + y = 180

Now, we already know that ∠y = 108°, so plug this in:

x + 108 = 180

x = 180 - 108 = 72°

Answer 2

72°

Explanation:

Supplementary angles add up to 180

Angle X + Angle Y = 180

Angle X + 108 = 180

Angle X = 180 - 108

Angle X = 72°