Mathematics - Geometry - Congruence and Similarity - Congruent figures - Congruence and Proofs

6 steps: (1) CONGRUENT means identical in shape and size (all corresponding sides and angles equal). (2) Triangle congruence tests: SSS (3 sides equal), SAS (2 sides + included angle), ASA (2 angles + included side), AAS, HL (right triangles). (3) SSS example: both triangles have sides 3,4,5 → congr