"Angle D is nine less than twice the measure of Angle C"
D = 2C - 9
and we know C+D = 180 , so .....
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!
2 answers
D= 117
C= 63
C= 63