In the context of parallel lines and transversals, what are angles called that lie on opposite sides of the transversal and outside the parallel lines?

The angles that lie on opposite sides of the transversal and outside of the parallel lines are referred to as alternating exterior angles. These angles are formed when a transversal crosses two parallel lines, creating pairs of angles that are in corresponding positions relative to the parallel lines and the transversal.

When looking at the arrangement of these angles, the key characteristic is their position: they are located on opposite sides of the transversal and outside of the two parallel lines. This specific configuration allows for the property that states that if the parallel lines are cut by a transversal, the alternating exterior angles are equal.

In contrast, other angle classifications do not fit this description. Corresponding angles are found on the same side of the transversal, while complementary angles are simply two angles that add up to 90 degrees, regardless of their arrangement. Alternating interior angles, on the other hand, are located on opposite sides of the transversal but inside the parallel lines, which correctly differentiates them from the alternating exterior angles in this scenario.