This document discusses different methods for proving that two triangles are congruent, including: - Side-Side-Side (SSS), where all three sides of one triangle are congruent to the corresponding sides of the other triangle. - Side-Angle-Side (SAS), where two sides and the angle between them in one triangle are congruent to the corresponding parts in the other triangle. - Angle-Side-Angle (ASA), where two angles and the side between them in one triangle are congruent to the corresponding parts in the other. - Angle-Angle-Side (AAS), where two angles and a non-included side are congruent between the triangles. It notes that you need