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pentagonal orthobirotunda : ウィキペディア英語版 | pentagonal orthobirotunda
In geometry, the pentagonal orthobirotunda is one of the Johnson solids (''J''34). It can be constructed by joining two pentagonal rotundae (''J''6) along their decagonal faces, matching like faces. ==Related polyhedra==
The pentagonal orthobirotunda is also related to a Archimedean solid, the icosidodecahedron, which can also be called a ''pentagonal gyrobirotunda'', similarly created by two pentagonal rotunda but with a 36-degree rotation.
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