Use facts about supplementary angles to solve the following problem. Two angles are supplementary and have measures m∠ABC=15° and m∠CBD=x° . What is the value of m∠CBDm∠CBD ?(1 point)Responses15° 15 degrees180° 180 degrees75° 75 degrees165°165 degrees
Since two angles are supplementary, the sum of their measures must be 180°. Given that m∠ABC = 15°, we can find the measure of ∠CBD by subtracting 15° from 180°.
Thus, m∠CBD = 180° - 15° = 165°.
Therefore, the value of m∠CBD is 165°.