Acronym hirki
Name hemirhombichiro-icosahedron,
compound of 5 thah
 
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Circumradius 1/sqrt(2) = 0.707107
Vertex figure [3, 4, 3, 4/3] / 0
General of army id
Colonel of regiment se
Dihedral angles
(at margins)
  • between {3} and {4}:   arccos(1/sqrt(3)) = 54.735610°
External
links
hedrondude   wikipedia  

The convex hull of hirki is a (scaled) id.

(Because there are only half as many triangles in thah than in oct, the former pairwise coincidence of face planes within se here brakes down, any ike face of the former kernel now bears exactly 1 thah triangle.)


Incidence matrix

 30 |  4 |  2  2 || 1
----+----+-------++--
  2 | 60 |  1  1 || 1
----+----+-------++--
  3 |  3 | 20  * || 1
  4 |  4 |  * 15 || 1
----+----+-------++--
 6 | 12 |  4  3 || 5

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