Dodecagon Small 263×320 Medium 526×640 Large 842×1024 Download Tiff Original 1974×2400 | (192.2 KB) Description "A polygon of...twelve sides is [a] dodecagon." —Hallock 1905 Keywords dodecagon, polygon, Sides, twelve Galleries Dodecagons Source: V. I. Hallock I.C.S. Refrence Library (Scranton: International Textbook Company, 1905) 6:25
