how many sides do a nonagon
In geometry, a nonagon /ËnÉnÉÉ¡Én/ (or enneagon /ËÉniËÉÉ¡Én/) is a nine-sided polygon. The name nonagon is a prefix hybrid formation, from Latin (nonus, ninth + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.