well a square assumes 4 sides are the same. So you can start by length x height = 81 (the area). So since length and height are equal (b/c it's a square), you can say x squared=81, and solve for x. Then you can get a side.
I'm trying to figure out the rest.
Last edited by MDydinanM; 10-05-2012 at 05:33 PM.