Use facts about supplementary angles to solve the following problem. Two angles are supplementary and have measures m ABC = 15 degrees and m CBD = x degrees. What is the value of m CBD?
A. 15 degrees
B. 75 degrees
C. 180 degrees
D. 165 degrees
1 answer
Since the angles are supplementary, their measures add up to 180 degrees. Given that m ABC = 15 degrees, we can write the equation: 15 + x = 180. Solving for x, we find x = 165 degrees. Therefore, the answer is D. 165 degrees.