Tridecagon (Wikipedia)

excerpt

In geometry, a tridecagon or triskaidecagon or 13-gon is a thirteen-sided polygon.

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2024-06-28

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https://en.wikipedia.org/wiki/Tridecagon

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tridecagon

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Tetradecagon (Wikipedia) In geometry, a tetradecagon or tetrakaidecagon or 14-gon is a fourteen-sided polygon.

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Dodecagon (Wikipedia) In geometry, a dodecagon, or 12-gon, is any twelve-sided polygon.