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Parallelogramnoun

(geometry) A convex quadrilateral in which each pair of opposite edges are parallel and of equal length.

A polygon with four sides.

Parallelogramnoun

either of two rectangular areas (respectively the large parallelogram and the small parallelogram) abutting the goal line in front of the goal. (Since 1986 officially named the large rectangle and small rectangle, though the older names are still occasionally used.)

An area defended by four fortresses supporting each other.

βThe Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano.β;

Parallelogramnoun

A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; - sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles.

having four sides.

Parallelogramnoun

a quadrilateral whose opposite sides are both parallel and equal in length

Having four sides, and consequently four angles; quadrangular.

Parallelogram

In Euclidean geometry, a parallelogram is a simple (non-self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.

A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.

An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano.

a four-sided polygon