Answer:
the first one: The coordinates of A' are (-2, 3)
and the last one: The coordinates of B' are (-2, 0) and the coordinates of C' are (2, -1).
Step-by-step explanation:
when you rotate a triangle counterclockwise by 90° you swap the numbers of the x and y coordinates.
like how the coordinates of B' were (0, 2) and became (-2,0) once the triangle was rotated.
