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Bicupola

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(Redirected fromBicupola (geometry))
Solid made from 2 cupolae joined base-to-base


Ingeometry, abicupola is a solid formed by connecting twocupolae on their bases. Here, two classes of bicupola are included because each cupola (bicupola half) is bordered by alternating triangles and squares. If similar faces are attached together the result is anorthobicupola; if squares are attached to triangles it is agyrobicupola.

Forms

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Set of orthobicupolae

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SymmetryPictureDescription
D3h
[2,3]
*223
Triangular orthobicupola (J27): 8 triangles, 6 squares.[1][2] Its dual is thetrapezo-rhombic dodecahedron
D4h
[2,4]
*224
Square orthobicupola (J28): 8 triangles, 10 squares.[2]
D5h
[2,5]
*225
Pentagonal orthobicupola (J30): 10 triangles, 10 squares, 2 pentagons.[2]
Dnh
[2,n]
*22n
n-gonal orthobicupola:2n triangles,2n rectangles, 2n-gons

Set of gyrobicupolae

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An-gonal gyrobicupola has the same topology as an-gonal rectified antiprism,Conway polyhedron notation,aAn.

SymmetryPictureDescription
D2d
[2+,4]
2*2
Gyrobifastigium (J26) ordigonal gyrobicupola: 4 triangles, 4 squares.[citation needed]
D3d
[2+,6]
2*3
Triangular gyrobicupola orcuboctahedron: 8 triangles, 6 squares.[1][2] Its dual is therhombic dodecahedron.
D4d
[2+,8]
2*4
Square gyrobicupola (J29): 8 triangles, 10 squares.[2] Its dual is the elongatedtetragonal trapezohedron
D5d
[2+,10]
2*5
Pentagonal gyrobicupola (J31): 10 triangles, 10 squares, 2 pentagons.[2] Its dual is the elongatedpentagonal trapezohedron
Dnd
[2+,2n]
2*n
n-gonal gyrobicupola:2n triangles,2n rectangles, 2n-gons.

References

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  1. ^abOgievetsky, O.; Shlosman, S. (2021). "Platonic compounds and cylinders". In Novikov, S.; Krichever, I.; Ogievetsky, O.; Shlosman, S. (eds.).Integrability, Quantization, and Geometry: II. Quantum Theories and Algebraic Geometry.American Mathematical Society. p. 477.ISBN 978-1-4704-5592-7.
  2. ^abcdefBerman, M. (1971). "Regular-faced convex polyhedra".Journal of the Franklin Institute.291 (5):329–352.doi:10.1016/0016-0032(71)90071-8.MR 0290245.
Convexpolyhedra
Platonic solids(regular)
Catalan solids
(duals of Archimedean)
Dihedral regular
Dihedral uniform
duals:
Dihedral others
Degenerate polyhedra are initalics.
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