Square (geometry)
A square is a four-side geometric figure in which all sides are equal and all angles are right angles.
Introductory
A square is a a special quadrilateral in that it is regular.
Area
The area of a square can be found by squaring the square's side length - 
.
Perimeter
The perimeter of square can be found by multiplying the square's side length by four - 
.
Diagonal
The Diagonal of a square is obtained by the Pythagorean theorem. 
