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
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Responses
180°
180 degrees
15°
15 degrees
75°
75 degrees
165°
1 answer
The sum of the measures of supplementary angles is always 180°. Since one angle measures 15°, the other angle must measure 180° - 15° = 165°. Therefore, the value of m∠CBD is 165°.