SOLUTION: angle C and angle D are supplementary. the measure of angle D is eight times hte measure of angle C. Find the measure of angle C and the measure of angle D

Algebra ->  Angles -> SOLUTION: angle C and angle D are supplementary. the measure of angle D is eight times hte measure of angle C. Find the measure of angle C and the measure of angle D      Log On


   



Question 334228: angle C and angle D are supplementary. the measure of angle D is eight times hte measure of angle C. Find the measure of angle C and the measure of angle D
Answer by Fombitz(32388) About Me  (Show Source):
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C%2BD=180
D=8C
Substituting into the first equation,
C%2B8C=180
9C=180
C=20degrees
D=8%2820%29=160degrees