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)
Responses
180°
180 degrees
15°
15 degrees
75°
75 degrees
165°
Since two angles are supplementary, their measures add up to 180°.
Therefore, if m∠ABC = 15°, then m∠CBD must be equal to 180° - 15° = 165°.
So, the value of m∠CBD is 165°.