1.

A quadrilateral whose opposite sides are parallel.

Answer»

In Euclidean plane geometry, a quadrilateral is a polygon with four edges and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon, hexagon and so on

In a square, rectangle, or rhombus, theopposite sidelines areparallel. Aquadrilateralwith theopposite sidelinesparallelis known as a parallelogram. If only one pair ofopposite sidesis required to beparallel, the shape is a trapezoid.



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