Answer :
Corresonding congruent parts
[tex]\begin{gathered} \angle A\longrightarrow\angle S \\ \angle B\longrightarrow\angle T \\ \angle C\longrightarrow\angle U \\ AB\longrightarrow ST \\ BC\longrightarrow TU \\ CA\longrightarrow US_{} \end{gathered}[/tex]