Answer:
Step-by-step explanation:
1) You can show that two pairs of angles of each triangle are equal, ∠SRP = ∠SRT = 90°, and the given ∠QPR and ∠STR
2) This means that ∠PQR and ∠TSR must be identical as well as the internal angles of a triangle must sum to 180°
3) Three angles of triangles identical is sufficient to say that the triangles are similar. (Actually you only need two equal pairs of angles for proof because step 2 is rather redundant)
