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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".

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 ...

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 ...

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%3F&v=J3QH1TTIKkM
Jul 28, 2012 ... Geometry Teachers Never Spend Time Trying to Find Materials for Your Lessons Again! Join Our Geometry Teacher Community Today!

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 ...

virtualnerd.com/geometry/quadrilaterals/trapezoids-kites/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 ...

thinkmath.edc.org/resource/shape-trapezoid

Meaning. A trapezoid is a quadrilateral with at least one pair of parallel sides. No other features matter. (In English-speaking countries outside of North America, ...

www.mathopenref.com/trapezoid.html

Base, One of the parallel sides. Every trapezoid has two bases. See Base definitions. Leg, The sides AC and BD above are called the legs of the trapezoid, and ...

www.amathsdictionaryforkids.com/qr/t/trapezium.html

Tt. trapezium, trapezoid. • a trapezium (UK) or a trapezoid (US) is a quadrilateral with at least one pair of parallel sides. • Parallel sides are called bases.