# Trapezoid

From Wixpert

A **trapezoid** is a four sided (quadrilateral or quadrangle) plane geometric shape with a pair of parallel lines. By most definitions, a trapezoid must have exactly one pair of parallel lines, so a quadrilateral with two pairs of parallel lines (a parallelogram) is not a trapezoid; unfortunately, this definition is not universal and sometimes a trapezoid may have both sets of lines parallel.

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