What is the definition of supplementary angles?

Supplementary angles are defined as two angles whose measures add up to 180 degrees. This relationship is fundamental in geometry and is often used in various mathematical applications, such as solving for unknown angle measures in geometric figures.

When two angles sum to 180 degrees, they can be either adjacent (sharing a vertex and a side) or non-adjacent. This means that supplementary angles can exist in various forms within geometric configurations, such as linear pairs or angles that are part of parallel lines cut by a transversal. Understanding this definition allows students to apply their knowledge effectively in problems that involve angle relationships, reinforcing their skills in geometry and measurement.