What is a transversal line?

A transversal line is defined as a line that intersects two or more other lines in a plane. This relationship helps to create several angles at the points of intersection, which can be analyzed in various mathematical contexts, especially when dealing with parallel lines. When two parallel lines are crossed by a transversal, several angle relationships are established, such as alternate interior angles, corresponding angles, and consecutive interior angles, which are crucial in geometry.

The importance of the transversal in geometry extends to helping understand properties of angles formed when parallel lines are cut by a transversal, giving rise to various theorems and problems. Thus, the characterization of a transversal as a line that intersects multiple lines is fundamental to its definition and usefulness in geometric analysis.