Khan Academy Static

Learn how the definition of congruence using rigid transformations can be simplified to simple criteria when studying congruent triangles.

4236_Why_SSA_isn_t_a_congruence_postulate_criterion.html

4237_Determining_congruent_triangles.html

4234_Congruent_triangles_the_SSS_postulate_criterion.html

4235_Triangle_congruence_postulates_criteria.html