Elongated pentagonal orthobirotunda
- Elongated pentagonal orthobirotunda
Infobox Polyhedron
Polyhedron_Type=Johnson
J41 - J42 - J43
Face_List=2.10 triangles
2.5 squares
2+10 pentagons
Edge_Count=80
Vertex_Count=40
Symmetry_Group="D"5h
Vertex_List=20(3.42.5)
2.10(3.5.3.5)
Dual=-
Property_List=convex
In geometry, the elongated pentagonal orthobirotunda is one of the Johnson solids ("J"42). As the name suggests, it can be constructed by elongating a pentagonal orthobirotunda ("J"34) by inserting a decagonal prism between its congruent halves. Rotating one of the pentagonal rotundae ("J"6) through 36 degrees before inserting the prism yields the elongated pentagonal gyrobirotunda ("J"43).
The 92 Johnson solids were named and described by Norman Johnson in 1966.
External links
* [http://mathworld.wolfram.com/JohnsonSolid.html Johnson Solid -- from MathWorld]
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Elongated pentagonal gyrobirotunda — Infobox Polyhedron Polyhedron Type=Johnson J42 J43 J44 Face List=2310 triangles 10 squares 2+10 pentagons Edge Count=80 Vertex Count=40 Symmetry Group= D 5d Vertex List=20(3.42.5) 2.10(3.5.3.5) Dual= Property List=convexIn geometry, the elongated … Wikipedia
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