rhombus

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rhombus

an oblique-angled parallelogram having four equal sides

Rhombus

 

a plane quadrangle with equal sides (Figure 1). It may be regarded as the special case of the parallelogram where two adjacent sides are equal, the diagonals are perpendicular,

Figure 1

or a diagonal bisects the angles of the vertices that it joins. A rhombus with right angles is called a square.

rhombus

[′räm·bəs]
(mathematics)
A parallelogram with all sides equal. Also known as rhomb.