Answer:
ASA is a possible congruent theorem that could be used to prove the triangles congruent.
Explanation:
Given


Proof: In triangle STR and SUR
1.Statement:

Reason: Given
2.Statement:

Reason: Given
3.Statement: RS=RS
Reason: Reflexive property of equality.
4.Statement:

Reason: ASA ( Angle-Side-Angle) property of congruence.
Hence, the triangle are congruent by the ASA congruence theorem .