What is a supplementary angle?
2 answers:
Supplementary angles are angles that usually share a common side, but they don't have to. If you joined them together, they would measure a straight angle and together they form a straight angle which measures 180°. If the sum of the measures of two angles is 180°, then the angles are classified as supplementary angles.
An example of a supplementary angle is provided in the image attached.
You might be interested in