HP of Yutaka Nishiyamayutaka-nishiyama.sakura.ne.jp/keidai/keidaironshu_059...gon, the polyhedron...
5
HP of Yutaka Nishiyamayutaka-nishiyama.sakura.ne.jp/keidai/keidaironshu_059...gon, the polyhedron itself is described as regular. When there are two or more types of regular polygon,