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Web Results

en.wikipedia.org/wiki/Quadrilateral

In Euclidean plane geometry, a

www.mathsisfun.com/quadrilaterals.html

www.khanacademy.org/math/geometry/quadrilaterals-and-polygons/v/quadrilateral-overview

Sal introduces the term

www.khanacademy.org/math/geometry-home/quadrilaterals-and-polygons

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

A

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

Learn about

www.cut-the-knot.org/Curriculum/Geometry/Quadrilaterals.shtml

Classification of

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

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

www.math.com/school/subject3/lessons/S3U2L3DP.html

There are many different kinds of

www.mathopenref.com/quadrilateral.html

The

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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mathworld.wolfram.com

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

www.khanacademy.org

Sal introduces the term

www.regentsprep.org

A