Are you sure you "understand" coordinates?

The 2 lower ones should be (0, -5) and (5,-5).

Say you have this parallelogram:

AB = CD = 9 and AC = BD = 5; height from A to CD = 4.Code:A B C D

If you place A at origin and B on x axis, what will be the coordinates of B, C and D?

If you can't answer that, you're sure not ready for this.