Pairs of angles

Special Name

Definition

Examples

Complementary angles

Two angles whose measures have a sum of 90


Supplementary angles

Two angles whose measures have a sum of 180


The measure of an angle is 76°. What is the measure of a complementary angle?
Since the angles are complementary, their measures must add to 90°. Set up an equation and solve for n.
The measure of the complementary angle is 14°.
The measure of an angle is 94°. What is the measure of a supplementary angle?
Since the angles are supplementary, their measures must add to 180°. Set up an equation and solve for n.
The measure of the supplementary angle is 86°.
The measure of an angle is 87 °. What is the measure of a complementary angle?