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 165° 165 degrees 15° 15 degrees 75°
3 answers
The sum of the measures of two supplementary angles is always 180°. Therefore, the measure of ∠CBD must be 180° - 15° = 165°.
you sure
Yes, I am confident that the measure of ∠CBD must be 165°. This is because the sum of the measures of two supplementary angles is always 180°. In this case, one angle is given to be 15°, so the other angle must be 180° - 15° = 165° to make the pair supplementary.