Acronym sidhei
TOCID symbol D*|E
Name small dodecahemicosahedron,
great dodecahemiicosahedron (but not gidhei)
 
 © ©
Circumradius 1
Vertex figure {5/3,6,5/2,6]
General of army id
Colonel of regiment did
Dihedral angles
  • between {5/2} and {6}:   arccos(sqrt[(5-2 sqrt(5))/15]) = 79.187683°
Confer
Grünbaumian relatives:
2sidhei   did+sidhei+gidhei  
External
links
hedrondude   wikipedia   mathworld

As abstract polytope sidhei is isomorphic to gidhei, thereby replacing pentagrams by pentagons.


Incidence matrix according to Dynkin symbol

hemi( x5/3o5/2x3*a )

30 |  4 |  2  2
---+----+------
 2 | 60 |  1  1
---+----+------
 5 |  5 | 12  *
 6 |  6 |  * 10

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