Who is asking: Parent
This is interesting, because there IS no particular answer.
Given a length of the sides (there are ALL the same) there COULD be a square, or it could be 'flat' (all the vertices on a line) or anywhere in between.
Any ONE of the angles could range from 0 to 180 degrees. Given ONE of the angles, the rest are determined (the opposite one is the same, and the other two are the value 180 - the original angle).