Question

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?

Answer 1

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^@`.