Acronym geihid
TOCID symbol J|E*
Name great icosihemidodecahedron
Circumradius (sqrt(5)-1)/2 = 0.618034
 
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Vertex figure [3/2,10/3,3,10/3]
General of army id
Colonel of regiment gid
Dihedral angles
  • between {3} and {10/3}:   arccos(sqrt[(5+2 sqrt(5))/15]) = 37.377368°
Confer
Grünbaumian relatives:
2geihid   gid+geihid+gidhid  
External
links
hedrondude   wikipedia   mathworld

As abstract polytope geihid is isomorphic to seihid, thereby replacing decagrams by decagons.


Incidence matrix according to Dynkin symbol

hemi( o3/2x5/3x3*a )

30 |  4 |  2 2
---+----+-----
 2 | 60 |  1 1
---+----+-----
 3 |  3 | 20 *
10 | 10 |  * 6

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