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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


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 ...

Quadrilateral types | Polygons | Khan Academy


Identifying quadrilaterals such as kites, trapezoids, parallelograms, rhombuses, rectangles, and squares by line and angle type.

Quadrilateral angles | Polygons | Geometry foundations | High ...


Find missing angle measures in quadrilaterals. ... Polygons. Quadrilateral angles. Find missing angle measures in quadrilaterals. Problem. What is the value of ...

Classification of Quadrilaterals


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

Polygons - Quadrilaterals - First Glance - Math.com


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 Quadrilateral Family - Regents Exam Prep Center


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

Math Forum: Ask Dr. Math FAQ: Quadrilateral Formulas


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

Quadrilateral Shapes - Geometry: Math Games - Sheppard Software


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

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


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 ...

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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Quadrilaterals | Geometry | Khan Academy


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.

Quadrilateral types | Quadrilaterals | Shapes | Basic geometry | Khan ...


Identify quadrilaterals based on pictures or attributes. Quadrilaterals included are parallelograms, rhombuses, rectangles, and squares.

Quadrilateral -- from Wolfram MathWorld


(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.