rectangular adj

1 having four right angles; "a rectangular figure twice as long as it is wide"

2 having a set of mutually perpendicular axes; meeting at right angles; "wind and sea may displace the ship's center of gravity along three orthogonal axes"; "a rectangular Cartesian coordinate system" [syn: orthogonal]

English

Adjective

rectangular

1. Having a shape like a rectangle.

Translations

• Dutch: rechthoekig, rechthoekige
• Finnish: suorakulmainen, suorakaiteen muotoinen
• French: rectangulaire
• German: rechteckig
• Telugu: చతురస్త్ర (chaturastra), చదరం (chadaram)

In geometry, a rectangle is defined as a quadrilateral where all four of its angles are right angles. A rectangle with vertices ABCD would be denoted as rectanglenotation ABCD.

From this definition, it follows that a rectangle has two pairs of parallel sides; that is, a rectangle is a parallelogram. A square is a special kind of rectangle where all four sides have equal length; that is, a square is both a rectangle and a rhombus. A rectangle that is not a square is colloquially known as an oblong.

Normally, of the two opposite pairs of sides in a rectangle, the length of the longer side is called the length of the rectangle, and the length of the shorter side is called the width.

The area of a rectangle is the product of its length and its width; in symbols, A=lw. For example, the area of a rectangle with a length of 5 and a width of 4 would be 20, because 5 \times 4 = 20.

In a rectangle the diagonals cross each other at their respective midpoints, under the same argument as for parallelograms. Unlike general parallelograms the two diagonals of a rectangle have the same length, the length of the diagonal can be found using the Pythagorean theorem.

In calculus, the Riemann integral can be thought of as a limit of sums of the areas of arbitrarily thin rectangles.

See also

• Rectorsal
• Cuboid
• Hyperrectangle
• Rectangular function
• Square (geometry)

External links

• Animated course (Construction, Circumference, Area)
• Definition and properties of a rectangle With interactive animation
• Area of a rectangle with interactive animation

cube-shaped, cubed, cubic, cubiform, cuboid, diced, elliptical, elongated, foursquare, normal, oblong, oblongated, oblongitudinal, orthodiagonal, orthogonal, orthometric, perpendicular, quadrangular, quadrate, quadriform, quadrilateral, rhombic, rhomboid, right-angle, right-angled, right-angular, square, tetragonal, tetrahedral, trapezohedral, trapezoid