Answer:
Triangle RQS
Step-by-step explanation:
Pieces of Right Triangles Similarity Theorem
If the altitude is drawn from the right angle to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other.
Side PQ ≅ PR ≅ RQ
Side QR ≅ RS ≅ QS
Therefore: ΔPQR ≅ ΔPRS ≅ ΔRQS
Note: The right triangle STQ is also similar to the other right triangles.