You are a square
A quadrilateral with four congruent sides and uncongruent diagonals is a Rhombus. See related link for a picture
A rhombus is a quadrilateral with four equal sides.
It is a square.
The sum of the four sides of a quadrilateral is equal to its perimeter.
A square is a quadrilateral with four equal sides and four right angles.
A rhombus is a quadrilateral because it has four sides. A quadrilateral with four equal sides is a rhombus.
A rectangle is a quadrilateral with four sides. All angles are right angles, the diagonals are congruent, and the opposite sides are all equal. A rhombus (diamond) is a quadrilateral with congruent daigonals and equal angles.