quadrangle
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Magdalen College, Oxford, quadrangle
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A plane figure consisting of four points, each of which is joined to two
other points by a line segment. A quadrangle may be concave
or convex depending on whether the line segments
do or don't intersect. A convex quadrangle is a quadrilateral.
The word is from the Latin quadrangulum for four-cornered and is
also used to describe a rectangular area surrounded on all four sides by
buildings, or to such buildings themselves. Related category
POLYGONS
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