# Alternate Exterior Angles

When two lines are crossed by another line (called the Transversal):

**Alternate Exterior Angles** are a **pair of angles** on the outer side of each of those two lines but on opposite sides of the transversal.

In this example **a and h** are a pair of Alternate Exterior Angles

Also **b and g** are a pair of Alternate Exterior Angles.

To help you remember: the angle pairs are on **Alternate** sides of the Transversal, and they are on the **Exterior** of the two crossed lines.

## Parallel Lines

When the two lines being crossed are Parallel Lines the **Alternate Exterior Angles are equal**.

images/parallel-pair.js

*(Click on "Alternate Exterior Angles" to have them highlighted for you.)*

2111,2112