# Complementary and supplementary angles

3 videos

2 skills

In this tutorial we'll look at the most famous types of angle-pairs--complementary and supplementary angles. This aren't particularly deep concepts, but you'll find they do come in handy!

### Complementary and supplementary angles

VIDEO
8:31 minutes

Let's add some tools to our geometry tool belt. Here's a thorough explanation of complementary and supplementary angles, as well as definitions of adjacent and straight angles.

### Complementary and supplementary angles

PRACTICE PROBLEMS

### Equation practice with complementary angles (example)

VIDEO
2:33 minutes

Given the algebraic expressions that represent a pair of complementary angles, Sal forms and solves an equation.

### Equation practice with supplementary angles (example)

VIDEO
2:37 minutes

Given the algebraic expressions that represent a pair of supplementary angles, Sal forms and solves an equation.

### Equation practice with angle addition

PRACTICE PROBLEMS

Given the sum of a pair of angles and the algebraic expressions that represent them, form and solve an equation.