Which term describes the sum of angles that adds up to 180 degrees?

The term that describes the sum of angles that adds up to 180 degrees is supplementary angles. This concept is fundamental in geometry, particularly when dealing with linear pairs of angles. When two angles are supplementary, they together form a straight line, showcasing their total measure of 180 degrees.

Adjacent angles, on the other hand, are two angles that share a common side and vertex but do not necessarily add to 180 degrees. Vertical angles are formed when two lines intersect, creating pairs of angles that are opposite each other; these angles are always equal but do not relate to the sum of 180 degrees directly. Complementary angles refer to pairs of angles that add up to 90 degrees. Understanding these definitions helps clarify why supplementary angles are specifically associated with a sum of 180 degrees.