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  1. Octacontagon -- from Wolfram MathWorld

  2. octacontagon - Wiktionary, the free dictionary

  3. Octacontagon - EverybodyWiki Bios & Wiki

  4. List of polygons - Wikipedia

  5. octacontagon - Wolfram|Alpha

  6. Polygon - Wikipedia

  7. Octacontagon - definition of Octacontagon by The Free Dictionary

  8. What does octacontagon mean? - Definitions.net

  9. Octacontagon | Math Wiki - Fandom

  10. Octacontagon | Article about Octacontagon by The Free Dictionary