Pentagon
Chamber's Twientieth Century Dictionary · 1908 · p. 75
pen′ta-gon, n. ( geom. ) a plane figure having five angles and five sides: a fort with five bastions.— adj. Pentag′onal .— adv. Pentag′onally . [Gr. pentagōnon — pente , five, gōnia , angle.] IMG:c297_s_1908_Pentagram.png_utm_source_en.wiki source.org_utm_campaign_parser_utm_content_thumbnail_unscaled:Chambers_1908_Pentagram.png?utm_source=en.wiki source.org _campaign=parser _content=thumbnail_unscaled
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