ENCYCLOPEDIA OF QUADRIFIGURES
(EQF)
This encyclopedia is dedicated to Quadrifigures. A QUADRIFIGURE is a figure consisting of 4 points and/or 4 lines. 
E Q F  D E F I N I T I O N S

P R O P E R T I E S 

A quadrangle is a geometrical figure consisting of 4 points.
There is no order in these points.
Abbreviation: QA

A Quadrangle has:


A quadrilateral is a geometrical figure consisting of 4 lines.
There is no order in these lines.
Abbreviation: QL

A Quadrilateral has:


A quadrigon is a geometrical figure consisting of
4 consecutive points and 4 consecutive connecting lines.
There is a cyclic order in these points & lines.
Abbreviation: QG

A Quadrigon has:


The results of EQF also can be downloaded as a PDFfile: 