What is the difference between a pair of supplementary angles and a pair of complementary angles?

Question

Philoid · Accepted Answer

A pair of angles is complementary if the sum of their measures adds up to 90°s.

A pair of angles supplementary if the sum of their measures adds up to 180°s.

Δ ABC is a right angle. Triangle (where ∠ABC = 90°)

Here, ∠BAC + ∠ACB =90°

∴ ∠BAC and ∠ACB are complementary angle.

In the 2nd figure,

∠XYO + ∠OYZ = 180°

∴ ∠XYO and ∠OYZ are supplementary angles.