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Reference.org
Triacontagon
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<p>In <a href="/facts/Geometry/wTQf5ffQ">geometry</a>, a triacontagon or 30-gon is a thirty-sided <a href="/facts/Polygon/yAq7RjPz">polygon</a>. The sum of any triacontagon's interior angles is <a href="/facts/5040_(number)/BMhEgbL9">5040</a> degrees. </p>