supplementary angles
Two angles whose sum is 180 degrees
Supplementary angles are a pair of angles whose sum is equal to 180 degrees. In other words, when you add the measures of two supplementary angles together, you will get a result of 180 degrees.
For example, if one angle has a measure of 40 degrees, the supplementary angle would have a measure of 140 degrees (as 40 + 140 = 180). Another example would be if one angle has a measure of 60 degrees, the supplementary angle would have a measure of 120 degrees (as 60 + 120 = 180).
Supplementary angles can be found in many real-life situations, such as when two sides of a triangle form a straight line, or when two intersecting lines form a linear pair.
It is important to note that supplementary angles do not have to be adjacent angles (angles that share a common vertex and a common side). They can be separated from each other and still be considered supplementary, as long as their measures add up to 180 degrees.
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