SOLUTION: Find (if possible) the supplement of 123 degrees

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Question 279791: Find (if possible) the supplement of 123 degrees
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!

First let's learn what two supplementary angles are:

The straight angle indicated by the green arc is 180°.
The angle indicated by the blue arc is 123°, the given
angle.  The angle indicated by the red arc is the angle
we wish to find, I have labeled it x° 



So we see that 

blue%28%22123%B0%22%29+%2B+red%28%22x%B0%22%29+=+green%28%22180%B0%22%29

or

red%28%22x%B0%22%29+=+green%28%22180%B0%22%29-blue%28%22123%B0%22%29

red%28%22x%B0%22%29+=+red%28%2257%B0%22%29

Edwin