Question

Two angles (angle C and angle D) are

supplementary. The measure of angle C is
5x – 6 and the measure of angle D is 7x +
14. Find the measure in degrees of each
angle

Answer 1

C= 65.5°

D= 114.1°

Explanation:

5x - 6 + 7x +14 = 180

5x + 7x + 14 - 6 = 180

12x + 8 = 180

- 8 - 8

12x = 180

12x/12 = 180/12

x = 14.3

C= 5x - 6

5(14.3)-6

71.5 - 6

C=65.5°

D= 7x + 14

7(14.3) + 14

100.1 + 14

D= 114.1°

65.5 + 114.1 = 179.6°

When this is rounded up, you will get 180°

Hope this helps!