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(kwŏd′rə-lăt′ər-əl)
n.
A polygon having four sides.
Having four sides.

(ˌkwɒdrɪˈlætərəl)
(Mathematics) having or formed by four sides
n
(Mathematics) Also called: tetragon a polygon having four sides. A complete quadrilateral consists of four lines and their six points of intersection
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

(ˌkwɒd rəˈlæt ər əl)

1. having four sides.
n.
2. Geom.
a. a polygon with four sides.
b. a figure formed by four straight lines that have six points of intersection.

(kwŏd′rə-lăt′ər-əl)
A polygon that has four sides, such as a rectangle or rhombus.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 quadrilateral - a four-sided polygon      polygon, polygonal shape - a closed plane figure bounded by straight sidesparallelogram - a quadrilateral whose opposite sides are both parallel and equal in lengthtrapezium - a quadrilateral with no parallel sidestrapezoid - a quadrilateral with two parallel sides Adj. 1 quadrilateral - having four sidesfour-sidedmany-sided, multilateral - having many parts or sides
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
رُباعي الأضْلاع
čtyřúhelník
firkant
nelikulmio
fjórhliîa hlutur

ketursienis
četrstūris
vierhoekvierhoekig
štvoruholník

[ˌkwɒdrɪˈlætərəl]
B. N
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

nViereck nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995

(kwodriˈlӕtərəl) noun
a two-dimensional figure with four straight sides.
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in classic literature ?
Before a big fire lay Captain Smollett; and in a far corner, only duskily flickered over by the blaze, I beheld great heaps of coin and quadrilaterals built of bars of gold.
"Instead of making use of the square or rectangle, as has been done to this time, you will suppose your place inclosed in a regular hexagon, this polygon having the advantage of offering more angles than the quadrilateral one.
Those which first caught the eye were the Bernardins, with their three bell towers; Sainte-Geneviève, whose square tower, which still exists, makes us regret the rest; the Sorbonne, half college, half monastery, of which so admirable a nave survives; the fine quadrilateral cloister of the Mathurins; its neighbor, the cloister of Saint-Benoit, within whose walls they have had time to cobble up a theatre, between the seventh and eighth editions of this book; the Cordeliers, with their three enormous adjacent gables; the Augustins, whose graceful spire formed, after the Tour de Nesle, the second denticulation on this side of Paris, starting from the west.
Close beside it one descried the quadrilateral enclosure of the fair of Saint- Germain, where the market is situated to-day; then the abbot's pillory, a pretty little round tower, well capped with a leaden cone; the brickyard was further on, and the Rue du Four, which led to the common bakehouse, and the mill on its hillock, and the lazar house, a tiny house, isolated and half seen.
Documentaries that will be showcased in the Philippine leg of the festival are "Family in the Bubble," "Encounters with Silence," "Quadrilaterals," "Call Her Ganda," "Old Marine Boy," "Myeoneuri: My Son's Crazy Wife" and "Coming to you, Minu."
Are there other quadrilaterals with this property (balanced area for grey and white for every point)?
Recently, Bergweiler and Eremenko [8] have studied quadrilaterals with characteristics of precisely this type.
By simple visual inspection of all diagrams in one figure, it is very easy to check which prestress level suits all the quadrilaterals in the figure.
We discussed all the things we noticed--shapes (quadrilaterals), colors, lines and even how each nutcracker seemed to have a theme.
In the sequel the general line of reasoning to arrive at the list is illustrated by a detailed discussion of a typical example, namely the case where the vertex corona consists of one triangle, two quadrilaterals, and one hexagon.
I think that SSSS is a congruence property for quadrilaterals.

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