Chapter 4 - Congruent Triangles - 4-2 Triangle Congruence by SSS and SAS - Practice and Problem-Solving Exercises - Page 231: 12

You would need to show that angle T is congruent to angle V

In order to use the SAS postulate, you must prove that two different sets of sides are congruent. Then, you must show that the angle joining those two sides is congruent for the two triangles as well. Here, you have SSA, which is not a postulate that proves congruence. To only use SAS, you would need to show that angle T is congruent to angle V