Justify the last two steps of the proof. Help pls :)

Answer:
3. ST ≅ TS is a reflexive property
4. SSS (as we have just proved that all 3 corresponding sides are congruent)
Step-by-step explanation:
3. ST ≅ TS is a reflexive property
4. SSS (as we have just proved that all 3 corresponding sides are congruent)