Quadrilateral - Wikipedia, the free encyclopedia
In geometry, a quadrilateral is a polygon with four sides (or 'edges') and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes ...

Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid, Parallelogram
Quadrilateral just means "four sides" (quad means four, lateral means side). Any four-sided shape is a Quadrilateral. But the sides have to be straight, and it has to ...

Quadrilateral -- from Wolfram MathWorld
A quadrilateral, sometimes also known as a tetragon or quadrangle (Johnson 1929, p. 61) is a four-sided polygon. If not explicitly stated, all four polygon vertices are generally ...

quadrilateral - Definition of quadrilateral at YourDictionary.com
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quadrilateral: Definition from Answers.com
(Click to enlarge) quadrilateral convex quadrilateral non-convex quadrilateral (Academy Artworks) quadrilateral n

Quadrilateral | Define Quadrilateral at Dictionary.com
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Classification of Quadrilaterals from Interactive Mathematics ...
Classification of Quadrilaterals. Quadrilateral is a geometric shape that consists of four points (vertices) sequentially joined by straight line segments (sides). We find the ...

Polygons - Quadrilaterals - First Glance
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 ...

quadrilateral - definition of quadrilateral by the Free Online ...
quad·ri·lat·er·al (kw d r-l t r-l) n. Mathematics. A polygon having four sides. adj. Having four sides. quadrilateral. top: convex quadrilateral. bottom: non-convex quadrilateral

Quadrilateral (also: tetragon, quadrangle) definition ...
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 ...