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

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

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Question 96614This question is from textbook Geometry
: angle C and angle D are supplementary. The measure of angle D is eight times the measure of angle C. Find the measure of angle C and angle D. This question is from textbook Geometry

Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
Supplementary angles equal 180 degrees.
Angle C + Angle D =180 degrees
C + 8C=180
9C=180
9C/9=180/9
X=20
So,
D=9C=(8)(20)=160
.
C + D = 180
20 + 160 = 180

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