We can start by drawing the rectangle:
As we can see from the drawing, the coordinates of D are (4, 1).
Since the sides BC = AD, and B (1, 3) and C(4, 3).
D must have the same x coordinate as C, that is, x = 4.
Also, since AB = DC, the y coordinate for D must have the same y coordinate as A, that is, y = 1.
Therefore, the coordinates for D are (4, 1).
