Asked by Jay

Angle C and Angle D are supplementary angles. If the measure of Angle D is nine less than twice the measure of Angle C, find the measure of Angle D.

PLEASE HELP!!! I have no idea where to even start!
Answered by Reiny
"Angle D is nine less than twice the measure of Angle C"

D = 2C - 9

and we know C+D = 180 , so .....
Answered by Ksksks
D= 117
C= 63
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