Alternate Exterior Angles
When two lines are crossed by another line (called the Transversal): The pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles. In the example:
(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 LinesWhen the two lines being crossed are Parallel Lines the Alternate Exterior Angles are equal. (Click on "Alternate Exterior Angles" to have them highlighted for you.) |