# Alternate Exterior angles

The exterior angles which appear oppositely when two straight lines are cut by their transversal, are called alternate exterior angles or exterior alternate angles.

The intersection of two straight lines and their transversal forms four angles externally. Two pairs of exterior angles are appeared oppositely when two straight lines are cut by their transversal and each pair of exterior angles is called alternate exterior angles.

### Alternate Exterior angles of Parallel Lines and their Transversal

In this case, two parallel lines are cut by their transversal and it formed four angles externally and they are known as exterior angles mathematically.

One pair of exterior angles are opposite to each other and other pair of exterior angles are opposite to each other by the intersection of the lines. The two pairs of exterior angles are called as the alternate exterior angles.

### Alternate Exterior angles of Parallel Lines and their Transversal

In this case, two nonparallel lines are intersected by their transversal and their intersection formed four exterior angles. One pair of exterior angles are opposite to each other and the second pair of exterior angles are also opposite to each other. The two pairs of exterior angles are known as alternate exterior angles.