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A trapezoid (in North America) or trapezium (in Britain and elsewhere) is a quadrilateral, which is defined as a shape with four sides, which has one set of parallel sides. In North America, the term "trapezium" is used for what is elsewhere called an irregular quadrilateral.

Calculating area[change | change source]

To calculate the area of a trapezoid, you must add the two parallel sides together, divide that by 2, then times that by its height.

Other websites[change | change source]