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.

A shape with four straight sides, such as a square or a rectangle.

A closed plane (2D) figure having four straight sides. Examples include (but are not limited to) squares, rectangles, parallelograms, and trapezoids. 2D SUTRA elements are quadrilaterals, the four corners of which are called nodes.

A geometric figure with four sides.

a figure in a plane formed by connecting four segments endpoint to endpoint with each segment intersecting exactly two others

a geometric figure that has four sides and four angles

a kite if and only if it has two distinct pair of consecutive sides congruent

a kite if exactly two distinct pairs of adjacent sides are congruent

a parallelogram if and only if both pair of sides are parallel

a parallelogram if a pair of its opposite sides is parallel and is of equal length

a plane figure bounded by four straight lines

a polygon (a flat, closed, plane figure made up of three or more line segments called sides )

a rectangle if and only if all angles are congruent

a rhombus if and only if all sides are congruent

a square if and only if all sides and all angles are congruent

a trapezoid (American English) if and only if it contains two adjacent angles that add up to one straight angle , i

a trapezoid if and only if it contains two adjacent angles that add up to two right angles, i

a trapezoid if and only if it has at least one pair of sides parallel

a trapezoid if exactly one pair of opposite sides are parallel

a trapezoid if two sides are parallel

A polygon with four edges.

A polygon that has four sides

A flat object with four straight sides.

Four-sided; having a four-sided base or section.

A polygon with four sides.

Figure defined by four lines.