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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

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

The purpose of this task is for students to articulate a definition for a

www.mathsisfun.com/geometry/trapezoid.html

(Jump to Area of a

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

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www.mathinary.com/trapezoid.jsp

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

Note: A

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

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

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mathworld.wolfram.com/Trapezium.html