しちめんたい
七面体
1. heptahedron
2. HeptahedronA heptahedron is a polyhedron having seven sides, or faces. A heptahedron can take a surprising number of different basic forms, or topologies. Probably most familiar are the hexagonal pyramid and the pentagonal prism. Also notable is the tetrahemihexahedron, whose seven equilateral triangle faces form a rudimentary projective plane. No heptahedra are regular.
Read “Heptahedron” on English Wikipedia
Read “七面体” on Japanese Wikipedia
Read “Heptahedron” on DBpedia
Read “Heptahedron” on English Wikipedia
Read “七面体” on Japanese Wikipedia
Read “Heptahedron” on DBpedia
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