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.

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Rewritten by : Barada

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