Final answer:
The SSS congruency rule states that if three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent.
Step-by-step explanation:
The congruence rule known as side-side-side (SSS) states that if three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent.
To elaborate, if triangle ABC is congruent to triangle XYZ, it means that side AB is congruent to side XY, side BC is congruent to side YZ, and side AC is congruent to side XZ.
For example, if triangle ABC has side lengths of AB = 5 cm, BC = 7 cm, and AC = 6 cm, and triangle XYZ has side lengths of XY = 5 cm, YZ = 7 cm, and XZ = 6 cm, then the two triangles are congruent.