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∠CBD ?(1 point)
165°
180°
75°
15°
Since the two angles are supplementary, their measures add up to 180°.
m∠ABC + m∠CBD = 180°
Substituting the given values, we have:
15° + x° = 180°
Simplifying the equation, we get:
x° = 180° - 15°
x° = 165°
Therefore, the value of m∠CBD is 165°.