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Web Results

en.wikipedia.org/wiki/Quadrilateral

In Euclidean plane geometry, a

www.mathsisfun.com/quadrilaterals.html

www.math.com/school/subject3/lessons/S3U2L3GL.html

A

www.regentsprep.org/regents/math/geometry/gp9/lquad.htm

A

mathforum.org/dr.math/faq/formulas/faq.quad.html

Formulas for finding the area, perimeter, etc. of a

www.mathopenref.com/quadrilateral.html

The

www.sheppardsoftware.com/mathgames/geometry/shapeshoot/QuadShapesShoot.htm

Learn about

www.dictionary.com/browse/quadrilateral

www.shmoop.com/basic-geometry/quadrilaterals.html

Red

www.coolmath.com/reference/polygons-04-quadrilaterals

Properties of

Answer

A quadrilateral is any two dimensional, four-sided shape. Its sides must all be straight. Squares, rectangles and parallelograms are all different kinds of quadrilaterals.

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More Info

www.khanacademy.org

Sal identifies

mathworld.wolfram.com

(If the points do not lie in a plane, the

www.cut-the-knot.org

Classification of