Supplementary Angle

Jargon-Free Definition

Two angles that add up to a straight angle.

QCAA/AC9 Definition

A pair of angles whose measures sum to .

Examples of Word Use in School

  • Solve the supplementary angle.
  • Explain why the angles are supplementary.
  • Use the diagram to Identify supplementary angles.

Mathematical Definition

If two angles have measures and , they are supplementary when .