Question

The angles shown below are supplementary: A pair of supplementary angles is shown. One angle measures 10x and the other angle measures 60 degrees. What is the value of x? 6° 9° 12° 18°

Answer 1

It is 12 because there are 180 degrees in a set of supplementary angles and 12 times 10 equals 120, plus 60 equals 180.

Answer 2

Option C, 12°

Explanation:

When a pair of angles are supplementary that means their sum will be equal to 180°.

By this definition 10x + 60° = 180°

10x = 180 - 60

10x = 120°

x = 12°

Option C, 12° is the answer.