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°
15°
75°
180°
The sum of the measures of supplementary angles is always 180°.
Given that one angle, ∠ABC, has a measure of 15°, we can set up an equation:
15° + x° = 180°
Solving for x°, we subtract 15° from both sides:
x° = 180° - 15°
x° = 165°
Therefore, the value of ∠CBD is 165°.