Final answer:
The corresponding sides that are congruent by CPCTC are vw and rt in the given triangles.
Step-by-step explanation:
In order to show that Δrst ≅ Δuvw, a sequence of transformations is needed. CPCTC (Corresponding Parts of Congruent Triangles are Congruent) can be used to determine which parts of the triangles are congruent.
The correct answer is 1) vw ≅ rt. This represents the corresponding sides of the triangles that are congruent by CPCTC.