A square is a rectangle with four equal sides. The formula for the area of a square is
Area = (Side)^2In the diagram above, s = the length of a side, so area = s^2.
Perimeter = 4sA parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides are equal, as are opposite angles. The formula for
the area of a parallelogram is
Area = (base)(height)In the diagram above, h = height and b = base, so area = bh. The diagonals in a parallelogram intersect and bisect each other.