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.

Algebra ->  Angles -> 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.      Log On


   

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) About Me  (Show Source):
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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