The markers on the angles tell us about the congruence relationships between the angles of the triangles.
∠ RSV &≅ ∠ TSV
∠ R &≅ ∠ T
∠ SVR &≅ ∠ SVT
All angles in triangle △ SVR have congruent pairs in triangle △ SVT.
Checking Sides
Now let's check the sides. Notice that SV is a shared side between both triangles which means its congruent according to the Reflexive Property of Congruence.
The markers on the sides tell us about the congruence relationships between the sides of the triangles.
RV &≅ TV
SV &≅ SV
SR &≅ ST
All sides of triangle △ SVR have congruent pairs in triangle △ SVT.
Conclusion
Since the vertices of the two triangles can be paired up so that the corresponding angles and sides are congruent, the two triangles are congruent.
△ SVR ≅△ SVT
