Nonagon

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In geometry, a nonagon (/ˈnɒnəɡɒn/) or enneagon (/ˈɛniəɡɒn/) is a nine-sided polygon or 9-gon.

Mnemonic[edit]

1.[edit]

Think Nonagon as Nine-sided polygon

Nine-sided polygon Nonagon

The only basic polygon with an N in the first and third letters.

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