A transversal is a line that intersects two or more lines at different points. When a pair of lines are cut by a transversal, eight different angles are created. There are four angles around each point of intersection. The eight angles formed by the lines and the transversal receive special names.

Name	Description	Example
Corresponding Angles	Angles that lie in the same position around different intersection points.	$\angle 1$ and $\angle 5$
Alternate Interior Angles	Angles that lie between the lines on opposite sides of the transversal.	$\angle 3$ and $\angle 5$
Alternate Exterior Angles	Angles that lie outside the lines on opposite sides of the transversal.	$\angle 1$ and $\angle 7$
Same-Side Interior Angles	Angles that lie between the lines on the same side of the transversal.	$\angle 4$ and $\angle 5$
Same-Side Exterior Angles	Angles that lie outside the lines on the same side of the transversal.	$\angle 1$ and $\angle 8$