Acronym	seihid
TOCID symbol	I|D
Name	small icosihemidodecahedron
	© ©
Circumradius	(1+sqrt(5))/2 = 1.618034
Vertex figure	[3/2,10,3,10]
General of army	id
Colonel of regiment	id
Dihedral angles	between {3} and {10}:   arccos(sqrt[(5-2 sqrt(5))/15]) = 79.187683°
Face vector	30, 60, 26
Confer	Grünbaumian relatives: 2seihid   id+seihid+sidhid
External links

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

This polyhedron is an edge-faceting of the icosidodecahedron (id).

Incidence matrix according to Dynkin symbol

hemi( x3/2o3x5*a )

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