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A trapezoid is a quadrilateral with at least one pair of parallel sides.
In British English, a trapezoid is a quadrilateral with no parallel sides. A quadrilateral with at least one pair of parallel sides is called a "trapezium".

Trapezoid - Wikipedia

en.wikipedia.org/wiki/Trapezoid

In Euclidean geometry, a convex quadrilateral with at least one pair of parallel sides is referred to as a trapezoid in American and Canadian English but as a ...

4.G What is a Trapezoid? (Part 1) - Illustrative Mathematics

www.illustrativemathematics.org/content-standards/tasks/1504

The purpose of this task is for students to articulate a definition for a trapezoid. There are two competing definitions for "trapezoid": The exclusive definition of a ...

Trapezoid - Math is Fun

www.mathsisfun.com/geometry/trapezoid.html

(Jump to Area of a Trapezoid or Perimeter of a Trapezoid). A trapezoid is a 4- sided flat shape with straight sides that has a pair of opposite sides parallel.

www.ask.com/youtube?q=What Is a Trapezoid?&v=J3QH1TTIKkM
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What is a trapezoid - Mathinary.com

www.mathinary.com/trapezoid.jsp

A trapezoid is a shape of plane geometry. It's a quadrilateral, where at least two sides are parallel. If a trapezoid has two pairs of parallel sides, it's also called a ...

What is a Trapezoid? | Virtual Nerd

www.virtualnerd.com/middle-math/geometric-figures/polygons/trapezoid-definition

Note: A trapezoid is a special type of quadrilateral with some special properties. This tutorial introduces you to trapezoids and gives you a look at the special ...

Area of a Trapezoid - Math Goodies

www.mathgoodies.com/lessons/vol1/area_trapezoid.html

A trapezoid is a 4-sided figure with one pair of parallel sides. For example, in the diagram to the right, the bases are parallel. To find the area of a trapezoid, take ...

Trapezoid: Definition, Properties & Formulas - Video & Lesson ...

study.com/academy/lesson/trapezoid-definition-properties-formulas.html

A trapezoid has one pair of parallel sides. Learn more about the properties and formulas of trapezoids in this lesson. A quiz following the lesson...

Trapezium -- from Wolfram MathWorld

mathworld.wolfram.com/Trapezium.html

Trapezium. There are two common definitions of the trapezium. The American definition is a quadrilateral with no parallel sides; the British definition is a ...