Answer
Use method SAS for the following pairs:
1) $\angle VRS\cong\angle TSR$
2) $\overline{RV}\cong\overline{TS}$
3) $\overline{RS}\cong\overline{SR}$
Work Step by Step
It is already given that
1) $\angle VRS\cong\angle TSR$
2) $\overline{RV}\cong\overline{TS}$
Furthermore, $\overline{RS}\cong\overline{SR}$
So, we have 2 lines and the included angle of $\triangle VRS$ are congruent with 2 corresponding lines and the included angle of $\triangle TSR$.
Therefore, according to method SAS, $\triangle VRS\cong\triangle TSR$
