Question

show that the following point are the vertical of a square(-2,4) (2,0) (2,8) and (6,-4),find AB, CD, AC, BD, AD

Answer 1

I suspect a typo. The line from (2,0) to (2,8) is vertical. So, all the other lines must also be vertical or horizontal. They are not.

and I think you meant "vertices" of a square...