This document provides definitions and examples of triangle congruence concepts including corresponding angles and sides, included angles, and included sides. It defines corresponding angles and sides as angles or sides in different triangles that are in the same relative position. Included angles are defined as the angle between two sides of a triangle, and included sides are defined as the side between two angles of a triangle. Examples are given to illustrate these concepts and how to identify corresponding angles and sides, as well as included angles and sides in different triangles.