- Triangle proofs SSS, SAS, and others can prove triangles congruent
- Five methods for proving triangle congruence: SSS, SAS, ASA, AAS, HL
- SSS method: all corresponding sides of two triangles are congruent
- SAS method: two sides and the included angle are congruent to another triangle
- Additional methods like proving congruent angles and lines can also contribute to proving triangle congruence
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