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A pair of complimentary angles has a sum that measures 90 degrees. If your first angle is 40 degrees, the complement must equal 50. 90= 40+X 50=X
The opposite angle is the same as the known angle. Each of the adjacent angles is the supplementary angle to the known angle. That is the pair add up to 180 degrees.
A pair of supplementary angles add up to 180 degrees. In this instance, the supplement of an angle of 70 degrees is 180 - 70 = 110 degrees.
Every pair of supplementary angles includes one obtuse angle?
One pair of perpendicular lines would create one right angle. Some kites have one right angle.