Difference between Supplementary Complementary Angles

A complementary angle is understood when there are two angles whose sum is 90°. An example would be when it forms a right angle.

Example:

• What is the complementary angle of a 60 degree angle?
• An angle of 30 degrees.

What are supplementary angles?

A supplementary angle is two angles whose sum is 180°. A practical example would be when they are on the same side of a straight line.

Example:

• What is the supplementary angle of a 60 degree angle?
• An angle of 120 degrees.