To find the new vertex A' after dilating point A with respect to the origin using a magnitude of 3, you need to multiply the coordinates of point A by 3.
From the information provided, I will assume point A corresponds to the coordinates (0, 3) since it is common to list vertices A, B, C, and D in a coordinate system. If A is at (0, 3), then:
A' = (0 * 3, 3 * 3) A' = (0, 9)
If point A corresponds to different coordinates, please provide those coordinates, and I can perform the calculation accordingly!