Quadrilateral

[img]https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQDU2o4pXoS4VJvX1TkGZ9WMhI8eh65FQOiLmZLBM17ekxbxyEo[/img]
the paper is an example of a regular quadrilateral
– Jackson torok

Information: Quadrilateral