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*rhombus*# rhombus vs. parallelogram

## rhombus vs. parallelogram: What's the difference?

A *parallelogram* is a shape with four sides in which the opposite sides are parallel to each other. A *rhombus* is a specific type of *parallelogram* in which all four sides are the same length. When the four corners of a *parallelogram* are right angles (meaning none of the sides are slanted), it’s called a *rectangle*. When the four corners of a four-sided shape are right angles *and* its sides are all the same length, it’s called a *square*.

[ rom-buhs ]

noun,

- an oblique-angled equilateral parallelogram; any equilateral parallelogram except a square.
- an equilateral parallelogram, including the square as a special case.
- a rhombohedron.

[ par-uh-lel-uh-gram ]

noun

- a quadrilateral having both pairs of opposite sides parallel to each other.