1. Pentagonal bipyramidIn geometry, the pentagonal bipyramid (or dipyramid) is third of the infinite set of face-transitive bipyramids. Each bipyramid is the dual of a uniform prism. If the faces are equilateral triangles, it is a deltahedron and a Johnson solid (J13). It can be seen as two pentagonal pyramids (J2) connected by their bases. Although it is face-transitive, it is not a Platonic solid because some vertices have four faces meeting and others have five faces.
Read “Pentagonal bipyramid” on English Wikipedia
Read “双五角錐” on Japanese Wikipedia
Read “Pentagonal bipyramid” on DBpedia
Read “Pentagonal bipyramid” on English Wikipedia
Read “双五角錐” on Japanese Wikipedia
Read “Pentagonal bipyramid” on DBpedia
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