Četverokut – razlika između verzija

'''Četverokut''' ili '''četverougao''' je zatvoren geometrijski lik koji ima četiri kuta i četiri stranice. Zbroj svih kutova u četverokutu iznosi 360°°.

== Vanjski linkovi ==

* [http://agutie.homestead.com/files/VarigWitten.htm Varignon and Wittenbauer Parallelograms] by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"

* [http://agutie.homestead.com/files/vanaubel.html Van Aubel's theorem] Quadrilateral with four squares by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"

* [http://www.vias.org/comp_geometry/geom_quad_general.html Compendium Geometry] Analytic Geometry of Quadrilaterals

* [http://www.cut-the-knot.org/Curriculum/Geometry/PerpBisectQuadri.shtml Quadrilaterals Formed by Perpendicular Bisectors]

* [http://www.cut-the-knot.org/Curriculum/Geometry/ProjectiveQuadri.shtml Projective Collinearity in a Quadrilateral]

[[CategoryKategorija: Geometrija|C]]