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Lesson Summary. Supplementary angles are any two angles whose measures sum to 180 degrees. Supplementary angle pairs will either be two right angles (both 90 degrees) or be one acute angle and one obtuse angle. If two angles are both supplementary to the same angle, then the two angles are of equal measure.
Nov 14, 2015. Angles with a sum of 180 degrees. Supplementary angles are angles whose sum is 180 degrees. An example would be two angles that are 50 and 130. Their sum is 180 degrees, and they form a straight like when put together.