Loterre: Mathematics: quadrilateral

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quadrilateral

In geometry a quadrilateral is a four-sided polygon, having four edges (sides) and four corners (vertices). 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 quadrangle, or 4-angle. A quadrilateral with vertices ${\\displaystyle A}$ , ${\\displaystyle B}$ , ${\\displaystyle C}$ and ${\\displaystyle D}$ is sometimes denoted as ${\\displaystyle \\square ABCD}$ .
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Quadrilateral)

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