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Quadrilateral

en.wikipedia.org/wiki/Quadrilateral

In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used, ...

Quadrilaterals - Square, Rectangle, Rhombus, Trapezoid - Math is Fun

www.mathsisfun.com/quadrilaterals.html

Quadrilateral just means "four sides" (quad means four, lateral means side). A Quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines ...

Intro to quadrilateral | Classifying shapes | Khan Academy

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

Sal introduces the term quadrilateral as well as trapezoid, parallelogram, rectangle, rhombus, and square.

Quadrilaterals | Geometry | Khan Academy

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

Quadrilaterals only have one side more than triangles, but this opens up an entire new world with a huge variety of quadrilateral types. Learn about it here.

Polygons - Quadrilaterals - First Glance - Math.com

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

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 Shapes - Geometry: Math Games - Sheppard Software

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

Learn about quadrilaterals the fun way in this Quadrilateral Shape Shoot Geometry Math Game.

Classification of Quadrilaterals

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

Classification of Quadrilaterals. Quadrilateral is a geometric shape that consists of four points (vertices) sequentially joined by straight line segments (sides).

Math Forum: Ask Dr. Math FAQ: Quadrilateral Formulas

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

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

Polygons - Quadrilaterals - In Depth - Math.com

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

There are many different kinds of quadrilaterals, but all have several things in common: all of them have four sides, are coplanar, have two diagonals, and the ...

Quadrilateral (also: tetragon, quadrangle) - math word definition ...

www.mathopenref.com/quadrilateral.html

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 ...

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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Quadrilateral -- from Wolfram MathWorld

mathworld.wolfram.com

(If the points do not lie in a plane, the quadrilateral is called a skew quadrilateral.) There are three topological types of quadrilaterals (Wenninger 1983, p.

Intro to quadrilateral | Polygons | Khan Academy

www.khanacademy.org

Sal introduces the term quadrilateral as well as trapezoid, parallelogram, rectangle, rhombus, and square.

The Quadrilateral Family - Regents Exam Prep Center

www.regentsprep.org

A quadrilateral is any four sided figure. Do not assume any additional properties for a quadrilateral unless you are given additional information.