SOLUTION: what is the supplementary angle of m-n, a+90, and 2b-40?

Question 319592: what is the supplementary angle of m-n, a+90, and 2b-40?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
supplementary means sum of angles = 180
m-n,
180-(m-n)
180-m+n is the supplementary
..
a+90,
180-(a+90)
180-a-90
90-a is the supplementary
and 2b-40?
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