A polygon bounded by four line segments, each of which can be of any length. The sum of its four angles must be 360°. Types of quadrilaterals include the parallelogram (can be equilateral or non-equilateral), the rectangle (can be equilateral or non-equilateral), the rhombus (always equilateral), the trapezium (non-equilateral), and the trapezoid (non-equilateral). The formula with which to find a quadrilateral's area varies with each type. Also see radial and regular.

Glossary of Art Terms. 2014.

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  • Quadrilateral — Quad ri*lat er*al, n. 1. (Geom.) A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines. [1913 Webster] 2. An area defended by four fortresses supporting each other; as, the Venetian …   The Collaborative International Dictionary of English

  • quadrilatéral — ● quadrilatéral, quadrilatérale, quadrilatéraux adjectif Qui a quatre côtés. quadrilatéral, ale, aux [kwadʀilateʀal, o; kadʀilateʀal, o] adj. ÉTYM. 1556; de quadrilatère, ou lat. quadrilaterus. ❖ ♦ Didact …   Encyclopédie Universelle

  • Quadrilateral — Quad ri*lat er*al, a. [L. quadrilaterus: cf. F. quadrilat[ e]re, quadrilat[ e]ral. See {Quadri } and {Lateral}.] Having four sides, and consequently four angles; quadrangular. [1913 Webster] …   The Collaborative International Dictionary of English

  • Quadrilaterāl — (lat.), vierseitig …   Meyers Großes Konversations-Lexikon

  • quadrilatéral — quadrilatéral, ale (koua dri la té ral, ra l ) adj. Qui offre quatre côtés. ÉTYMOLOGIE    Quadri..., et latéral …   Dictionnaire de la Langue Française d'Émile Littré

  • quadrilateral — (n.) 1650, from L. quadrilaterus, from quadri four (see QUADRI (Cf. quadri )) + latus (gen. lateris) side (see OBLATE (Cf. oblate) (n.)) …   Etymology dictionary

  • quadrilateral — adj. 2 g. Que tem quatro lados …   Dicionário da Língua Portuguesa

  • quadrilateral — ► NOUN ▪ a four sided figure. ► ADJECTIVE ▪ having four straight sides …   English terms dictionary

  • quadrilateral — [kwä΄dri lat′ər əl] adj. [< L quadrilaterus (see QUADRI & LATERAL) + AL] four sided n. 1. Geom. a plane figure having four sides and four angles 2. a four sided area quadrilaterally adv …   English World dictionary

  • Quadrilateral — This article is about four sided mathematical shapes. For other uses, see Quadrilateral (disambiguation). Quadrilateral Six different types of quadrilaterals Edges and vertices 4 …   Wikipedia

  • quadrilateral — UK [ˌkwɒdrɪˈlæt(ə)rəl] / US [ˌkwɑdrɪˈlæt(ə)rəl] noun [countable] Word forms quadrilateral : singular quadrilateral plural quadrilaterals maths a flat shape with four sides such as a square Derived word: quadrilateral UK / US adjective …   English dictionary

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