Definition:Quadrilateral/Square

Definition
A square is a regular quadrilateral.

That is, a regular polygon with $4$ sides.

That is, a square is a plane figure with four sides all the same length and whose angles are all equal.


 * Square.png

Also known as
Writers of popular mathematical literature, appealing to the non-mathematically inclined, can be seen using the term perfect square.

However, as there is no such thing as an "imperfect square", this sort of usage not welcome on.

Also see

 * Internal Angles of Square: the angles of a square are all right angles


 * Area of Square