Question

What are supplementary​ angles? Describe how to find the measure of an​ angle's supplement.
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Part 1
Choose the correct answer below.
A.
Supplementary angles are two angles whose measures have a difference of 180degrees. To find the measure of an​ angle's supplement, add the given​ angle's measure to 180degrees.
B.
Supplementary angles are two angles whose measures have a sum of 90degrees. To find the measure of an​ angle's supplement, subtract the given​ angle's measure from 90degrees.
C.
Supplementary angles are two angles whose measures have a difference of 90degrees. To find the measure of an​ angle's supplement, add the given​ angle's measure to 90degrees.
D.
Supplementary angles are two angles whose measures have a sum of 180degrees. To find the measure of an​ angle's supplement, subtract the given​ angle's measure from 180degrees.

Answer 1

D. Supplementary angles are two angles whose measures have a sum of 180°. The supplement of an angle is found by subtracting its measure from 180° (supplement = 180° − given angle).