Use facts about supplementary angles to solve the following problem. Two angles are supplementary and have measures m/ABC = 15" and
mLCBD =z°. What is the value of mLCBD？ （1 point）
• 165°
• 180°
◎ 15°
◎ 75°
Since two angles are supplementary, their measures add up to 180 degrees.
Given:
m/ABC = 15°
m/LCBD = z°
Since m/ABC = 15°, we can find the measure of m/LCBD by subtracting 15° from 180°.
180° - 15° = 165°
Therefore, the value of m/LCBD is 165°.