Geometry · Triangles & Congruence
SSS Congruence
HSG-SRT.B.5
Definition
Triangles are congruent if all three pairs of corresponding sides are equal.
Examples
- If three sides of one triangle equal three sides of another, the triangles are congruent by SSS.
- Triangles with sides 3-4-5 and 3-4-5 are congruent by SSS.
Key rule
SSS needs all three side pairs to match — no angles required.
Memory hook
Side, Side, Side — three matching sides prove it.