prove triangle PQR ~ triangle TSR

Question

Prove: Triangle PQR~ triangle TSR

Answer 1

The two triangles are similar if, and only if, one angle of the first triangle has the same measure as an angle in the second triangle, AND THEN ONE OTHER ANGLE OF THE FIRST TRIANGLE HAS THE SAME MEASURE AS ONE OTHER ANGLE OF THE SECOND TRIANGLE.

 

That is a two step proof leading to similarity; reason "AA".