A square is a rectangle because it is a quadrilateral that has four congruent right angles.
A square is a parallelogram because it is a quadrilateral whose opposite sides are congruent (and parallel).
A square is a rhombus because it is a quadrilateral that has four congruent sides.
A square is a quadrilateral because it has four sides.
A square is a convex polygon because it is a closed figure with all interior angle measures less than 180.
