SOLUTION: i am having trouble understanding how to find the measure of s supplementary angle. i understand it has to equal 180, but how do i figure out which angles need which numbers?

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Question 673359: i am having trouble understanding how to find the measure of s supplementary angle. i understand it has to equal 180, but how do i figure out which angles need which numbers?
Found 2 solutions by ewatrrr, Alan3354:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Supplement of angle x is (180-x)  as x+%2B+%28180-x%29+=+180

ex:

The Supplement of a 20° angle is (180-20°)  as 20° + 160° = 180°

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
i am having trouble understanding how to find the measure of s supplementary angle. i understand it has to equal 180, but how do i figure out which angles need which numbers?
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"it" doesn't equal 180.
The sum of 2 supplementary angles = 180 degs
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The supplement of angle A = 180 - A
If you know one angle, you subtract to find the other one.