Angles A, B, and C forms a straight line. If measure of angle A is 30^\@ and measure of angle B is 100^\@, what is the measure of angle C?

1 Answer
Dec 10, 2017

Angle C is 50^@.

Explanation:

When three angles form a straight line, another way to define that is that those angles are supplementary. Supplementary angles are angles that add up to 180^@, which is the amount of degrees for a straight line. So to solve this, we just set up 100^@ + 30^@ + C = 180^@. 100 and 30 add up to 130, and then we just subtract 130 on both sides.

Our final answer is 50^@.