SOLUTION: Angle C and Angle D are supplementary angles Angle D is eight time bigger than Angle C what is C and D

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Question 652477: Angle C and Angle D are supplementary angles Angle D is eight time bigger than Angle C what is C and D
Answer by nerdybill(7384) About Me  (Show Source):
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Angle C and Angle D are supplementary angles Angle D is eight time bigger than Angle C what is C and D
.
Let C = measure of angle C
then
180-C = measure of angle D
.
180-C = 8C
180 = 9C
20 degrees = C
.
Angle D:
180-C = 180-20 = 160 degrees