This image of simple geometry is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
Heptagon
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The original description page was here. All following user names refer to en.wikipedia.
{{Non-free use rationale |Article = AIA Guide to New York City |Description = book cover |Source = https://s-media-cache-ak0.pinimg.com/736x/29/a8/a0/29a8a076a6948b27440461f16ade48d6.jpg |Portion = full cover |...
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