To find the coordinates of point D' after a 90° counterclockwise rotation about the origin, you can use the following transformation for point (x, y):
- The new coordinates after a 90° counterclockwise rotation will be (-y, x).
If we denote the original coordinates of point D as (x, y), the new coordinates after rotation will be:
D' = (-y, x)
Unfortunately, since you haven't provided the original coordinates of point D, I cannot determine the exact coordinates of D'. However, you can simply plug in the x and y coordinates of point D into the transformation to find D'.
If you have the original coordinates of point D, please share them, and I’ll assist you in calculating D'.