You are a square
Check to see that -- it has four sides -- its two diagonals are equal.
A parallelogram perhaps?
It is a rhombus
Yes because any shape that has four sides is a quadrilateral.
Nope, in order for the diagonals to be perpendicular the shape must be a square (which I guess is a type of rectangle :). The diagonals will cross, but not at a 90degree angle, unless the sides are of equal length.Not unless the rectangle has 4 equal sides, making it a squre.