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- DictionaryQuad·ri·lat·er·al/ˌkwädrəˈladər(ə)l/
noun
- 1. a four-sided figure.
adjective
- 1. having four straight sides.
noun
adjective
In geometry a quadrilateral is a four-sided polygon, having four edges and four corners. The word is derived from the Latin words quadri, a variant of four, and latus, meaning "side". It is also called a tetragon, derived from Greek "tetra" meaning "four" and "gon" meaning "corner" or "angle", in analogy to other polygons (e.g. pentagon). Since "gon" means "angle", it is analogously called a quadr... Wikipedia