Trigonal Dodecahedron Small 320×274 Medium 640×548 Large 1024×876 Download Tiff Original 2400×2054 | (456.4 KB) Description Illustration showing a trigonal dodecahedron. Keywords combination form, combination forms, dodecahedron, geometric solid, solids, trigonal Galleries Dodecahedrons Source: Frederick Converse Beach Encyclopedia Americana (New York, NY: Americana Company, 1903)
