Answer :
The angle of the image that triangle RST after rotation is the triangle R'S'T'
Naming of figures
From the given triangle RST, it undergoes a rotation of 90 degrees in a clockwise direction. The corresponding individual angles are named with a prime symbol as a superscript.
For instance, the corresponding image of A will be A', B will be B' and D will be D'.
Hence for the triangle RST, the image that triangle RST after rotation will be triangle R'S'T'
Learn more on rotation here: brainly.com/question/26249005