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Hexagon
In geometry, a hexagon (from Greek ἕξ hex, “six” and γωνία, gonía, “corner, angle”) is a six sided polygon or 6-gon. The total of the internal angles of any hexagon is 720°.
Wikipedia
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Hexagon (noun)
A polygon with six sides and six angles.
Wiktionary
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Hexagon (noun)
a plane figure with six straight sides and angles.
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Sexagon (noun)
hexagon.
Oxford Dictionary