What do supplementary angles equal when combined?

Supplementary angles are defined as two angles whose measures add up to 180 degrees. This relationship is fundamental in geometry and is frequently used in various applications, including proving the properties of polygons and solving problems involving angle measures.

When two angles are supplementary, if you take one angle and add the measurement of the other angle, the sum will always equal 180 degrees. For example, if one angle measures 120 degrees, the other must be 60 degrees to satisfy the condition because 120 + 60 = 180. This property is consistent across all pairs of supplementary angles, regardless of their individual measures.

Understanding this concept is crucial for solving problems related to angles, ensuring clarity in geometric relationships, and it often appears in various assessments, including standardized tests.