Joining two nonadjacent vertices (of a polygon or polyhedron).
Having slanted or oblique lines or markings.
A line joining non-adjacent vertices of a polygon.
Anything forming or resembling such a line
A city and town in Iowa.
From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”), from διά (diá, “across”) + γωνία (gōnía, “angle”).
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