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Octacontagon -- from Wolfram MathWorld
octacontagon - Wiktionary, the free dictionary
Octacontagon - EverybodyWiki Bios & Wiki
List of polygons - Wikipedia
octacontagon - Wolfram|Alpha
Polygon - Wikipedia
Octacontagon - definition of Octacontagon by The Free Dictionary
What does octacontagon mean? - Definitions.net
Octacontagon | Math Wiki - Fandom
Octacontagon | Article about Octacontagon by The Free Dictionary