In geometry, a square is a regular quadrilateral. This means that it has four equal sides and four equal angles (90-degree angles, or right angles). It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices ABCD would be denoted ABCD.

The square is the n=2 case of the families of n-hypercubes and n-orthoplexes.

Read more about Square:  Characterizations, Perimeter and Area, Coordinates and Equations, Construction, Properties, Other Facts, Non-Euclidean Geometry, Graphs

Famous quotes containing the word square:

    Rationalists, wearing square hats,
    Think, in square rooms,
    Looking at the floor,
    Looking at the ceiling.
    They confine themselves
    To right-angled triangles.
    Wallace Stevens (1879–1955)

    Mark you the floore? that square & speckled stone,
    Which looks so firm and strong,
    Is Patience:
    George Herbert (1593–1633)

    I would say it was the coffin of a midget
    Or a square baby
    Were there not such a din in it.
    Sylvia Plath (1932–1963)