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There is no assigned name, but names for polygons use Greek prefixes, so using the prefix for 90 (enneaconta) and for 9 (ennea), it would be an enneacontakaienneagon or enneacontaenneagon.

(An alternate name could be nonacontanonagon, using the alkene protocol of units followed by tens, and the Latin prefix nona-.)

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13y ago

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