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Keywords:
Trapezoid,
Congruent,
Polygon,
Parallelogram,
Rectangle
Having four sides, and consequently four angles; quadrangular.
An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano.
A polygon with fours sides and four angles whose sum is 360 degrees.
(L. quadrilaterus: quadrilateral) adj. With four sides.
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