Middle School

The measure of an angle is 173 degrees. What is the measure of its supplementary angle?

Answer :

the measure of the supplementary angle is 7 degrees.

To find the measure of a supplementary angle, we must remember that two angles are supplementary if the sum of their measures is 180 degrees.

We need to find the second angle such that:

[tex]\angle A + \angle B = 180[/tex]

Putting values we get:

[tex]173 + \angle B = 180\\\\ \angle B = 180 -173\\\\\angle B = 7[/tex]

So, the measure of the supplementary angle is 7 degrees.

180-173=7
the supplementary angles are 173 degrees and 7 degrees because they both add up to 180