Rectangle vs. Rhombus

Rectanglenoun

(geometry) A quadrilateral having opposing sides parallel and four right angles.

Rectanglenoun

A four-sided figure having only right angles; a right-angled parallelogram.

Rectangleadjective

Rectangular.

Rectanglenoun

a parallelogram with four right angles

Rectanglenoun

a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.

Rectangle

In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as: an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°); or a parallelogram containing a right angle.

Rhombusnoun

Any of several flatfishes, including the brill and turbot, once considered part of the genus Rhombus, now in Scophthalmus.

Rhombusnoun

Snails, now in genus Conus or family Conidae.

Rhombusnoun

(geometry) A parallelogram having all sides of equal length.

Rhombusnoun

Same as Rhomb, 1.

Rhombusnoun

a parallelogram with four equal sides; an oblique-angled equilateral parallelogram

Rhombusnoun

a quadrilateral all of whose sides have the same length.

Rhombus

In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length.