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About: Complete quadrangle     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatQuadrilaterals, within Data Space : dbpedia.org associated with source document(s)

Type: yago:WikicatConfigurationsyago:Abstraction100002137yago:Arrangement105726596yago:Attribute100024264yago:Cognition100023271yago:Configuration105731779yago:Design105728678yago:Figure113862780yago:PlaneFigure113863186yago:Polygon113866144yago:PsychologicalFeature100023100yago:Quadrilateral113879126yago:Shape100027807yago:Structure105726345yago:WikicatPolygonsyago:WikicatQuadrilaterals New Facet based on Instances of this Class

In mathematics, specifically in incidence geometry and especially in projective geometry, a complete quadrangle is a system of geometric objects consisting of any four points in a plane, no three of which are on a common line, and of the six lines connecting the six pairs of points. Dually, a complete quadrilateral is a system of four lines, no three of which pass through the same point, and the six points of intersection of these lines. The complete quadrangle was called a tetrastigm by , and the complete quadrilateral was called a tetragram; those terms are occasionally still used.