90 degrees clockwise rotation
Step-by-step explanation:
Transformation from P to P': (3, 1) to (1, -3)
Q to Q': (1, 4) to (4, -1)
R to R': (2, -5) to (-5, -2)
From the above, the original shape was transformed by interchanging the x and y coordinates as well as negating the previous x coordinate
This denoted as:
(x, y) to (y, -x)
This transformation is known as rotation of 90 degrees clockwise.
Hence, what is true about triangles PQR and P'Q'R' is a transformation of 90 degrees clockwise rotation