Khan Academy Static

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

7400_Congruent_triangles_the_SSS_postulate_criterion.html

7403_Determining_congruent_triangles.html

7402_Why_SSA_isn_t_a_congruence_postulate_criterion.html

7401_Triangle_congruence_postulates_criteria.html