Intersecting Lines and Transversal Angle Diagram - Geometry Reference #1494757 (License: Personal Use)

This diagram depicts three non-parallel lines (l, m, u) crossed by two transversals (n and t), creating five labeled angles (1-5) at their intersections. It is commonly used to teach angle pair relationships such as vertical, adjacent, corresponding, and alternate interior angles in Euclidean geometry. The configuration helps learners identify congruent and supplementary angle pairs based on line orientation.

Used in educational web pages, math tutorials, or Khan Academy-style lessons on plane geometry; targets students and teachers seeking visual reinforcement of angle theorems involving transversals and intersecting lines.