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A quadrilateral is a four-sided polygon with four angles. There are many kinds of quadrilaterals. The five most common types are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus.
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www.math.com/school/subject3/lessons/S3U2L3GL.html
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Quadrilateral just means "four sides" ; (quad means four, lateral means side). ... Any four-sided shape is a Quadrilateral. ... Try drawing a quadrilateral, and measure the angles. They should add to 360°...
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www.mathsisfun.com/quadrilaterals.html
www.mathsisfun.com/quadrilaterals.html
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Quadrilateral - Wikipedia, the free encyclopedia
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In geometry, a quadrilateral is a polygon with four 'sides' or edges and four vertices or corners . Sometimes, the term quadrangle is used, for analogy with triangle, and sometimes tetragon...
en.wikipedia.org/wiki/Quadrilateral
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A quadrilateral is a four-sided polygon, which is sometimes also called "quadrangle" or "tetragon". All four vertices of the quadrilateral have to lie on a plane, otherwise it is called a "skew quadrilateral". ... The sum of the angles in a (non-crossed) quadrilateral is 360°:
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www.vias.org/comp_geometry/geom_quad_general.html
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Formulas for finding the area, perimeter, etc. of a quadrilateral. ... Cyclic Quadrilateral ... A quadrilateral with four right angles and all four sides of equal length.
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mathforum.org/dr.math/faq/formulas/faq.quad.html
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A quadrilateral is a four-sided polygon. ... Cross-references: cyclic quadrilaterals, rectangles, rhombuses, squares, parallelograms, polygon; There are 34 references to this entry. This is version 4 of quadrilateral, born on 2001-12-11, modified 2006-11-03. Object id is 1072, canonical name is Quadrilateral.
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planetmath.org/encyclopedia/Quadrilateral.html
planetmath.org/encyclopedia/Quadrilateral.html
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Definition of quadrilateral from Webster's New World College Dictionary. Meaning of quadrilateral. Pronunciation of quadrilateral. Definition of the word quadrilateral. Origin of the word quadrilateral. ... Dictionary Home » Webster's New World College Dictionary » quadrilateral...
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www.yourdictionary.com/quadrilateral
www.yourdictionary.com/quadrilateral
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Since ALL the angles in a quadrilateral add up to 360 then 360 divided by 4 must be 90. ... Let us look at another quadrilateral and you will see why. ... Remember the rhombus and how we could squash it down? Well, if we do the same to a rectangle we get the next quadrilateral:
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www.icteachers.co.uk/children/sats/quadrilaterals.htm
www.icteachers.co.uk/children/sats/quadrilaterals.htm
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Quadrilateral definition and properties ... The quadrilateral is any 4-sided polygon. But it is the parent of a whole family of figures, each with their own distinct names and characteristics. See also Tetragon.
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www.mathopenref.com/quadrilateral.html
www.mathopenref.com/quadrilateral.html
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[kwŏd́rə-lăt́ər-əl]
