Mensuration of Squares
Area of a square: A square is a rectangle with four equal sides. To find the area of a square, multiply the length of one side by itself. If a square has an area of 'A' square units and length of a side 's' units, then A = s × s = s2.
Perimeter of a square: The perimeter of a square is the length of its boundary, which can be found by adding together the length of each side. Since all sides are equal in length, the perimeter is 4 times the length of a side.
If a square has a perimeter of 'P' units, and a side of length 's' units, then P = 4s.