What are the angles called that are located outside the parallel lines when cut by a transversal?

The angles located outside the parallel lines when cut by a transversal are referred to as exterior angles. When two parallel lines are crossed by a transversal, several angles are formed, including those that lie between the two parallel lines (interior angles) and those that lie outside of them. Exterior angles are specifically the ones that exist on the outer side of the parallel lines.

Understanding this concept is important because it helps students visualize how angles interact in geometric figures. Exterior angles have relationships with corresponding angles, interior angles, and vertical angles, but they are distinct due to their position outside the intersected lines. Recognizing this classification is essential in exploring geometric properties and solving related problems in mathematics.