Two angles that add up to 180 degrees are called supplementary angles.
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They are said to be supplementary angles that add up to 180 degrees
supplementary angles are angles that have a sum of 180*.another way to remember that its 180* is the two p's in the word make 8.example. 70*+110*= 180* supplementary.Complementary angles add up to 90 degrees.Supplementary angles are two angles whose sum add up to 180 degrees. Can be shown as (180 - x)
Those angles are called complimentary angles. They add up to 90 degrees. Two angles that add up to 180 degrees are called supplementary angles.
They can be but not always because supplementary angles add up to 180 degrees.
If the angles are EACH 180 degrees and they are placed adjacent, then they forma complete revolution of 360 degrees.If the two angles add up to 180 degrees when they are placed adjacent, then they aresupplementary angles.