Answer
The proof is in the following form:
Column 1 of proof; Column 2 of proof.
Thus, we have:
1. RS and TV are congruent; diameters of the same circle are congruent to each other.
2. TS is congruent to itself; identity
3. RT is congruent to VS; properties of circles
4. RST is congruent to triangle VTS; SSS