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[[Image:Gdhytd svg.png|right|thumb|400px]]
[[Image:Gdhytd svg.png|right|thumb|400px]]
A '''rhombus''' is an [[equilateral]] [[quadrangle]], which is a [[polygon]] having four sides of equal length. In non-academic contexts, its forms are called diamonds and [[square]]s.
A '''rhombus''' is an [[equilateral]] [[quadrilateral]], which is a [[polygon]] having four sides of equal length.
A [[square]] is a [[special case]] of a rhombus where all four [[interior angle|interior angles]] are ninety degrees.
In non-academic contexts, the term diamond can be applied to a rhombus, particularly if it is oriented with one of its diagonals vertical.<ref>http://www.merriam-webster.com/dictionary/diamond sense 3</ref>
Its area is the product of its diagonals divided by two. Note that its diagonals are [[perpendicular]] to each other, and bisect each other.
Its area is the product of its diagonals divided by two. Note that its diagonals are [[perpendicular]] to each other, and bisect each other.
<br><math>A=B \times H</math>
<br><math>A=B \times H</math>
== References ==
<references/>
[[Category:Plane Geometry]]
[[Category:Plane Geometry]]