You would subtract 40 degrees from 180 degrees so it would look like this:
180 degrees - 40 degrees = 140 degrees
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40 degrees ( 180 - 140 = 40 )
the answer to 180 degree angle is 72 degree angle.
Supplement of a 67 degree angle is 180 - 67 or 113.
a 175 degree angle
A 90 degree angle