Acronym sirsido
Name small retrosnub disoctahedron,
compound of 2 gike
 
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Circumradius sqrt[(5-sqrt(5))/8] = 0.587785
Inradius sqrt[(7-3 sqrt(5))/24] = 0.485556
Vertex figure [35]
General of army x3f4o
Colonel of regiment passipsido
External
links
hedrondude   wikipedia  

Faces of an octahedral subset of triangles pairwise fall into coincident face planes. So either those can be considered separately (type A); or they are considered as (rotated) 2-triangle-compounds (type B).


Incidence matrix

(Type A)

  24 |  4  1 |  3  2 || 1
-----+-------+-------++--
   2 | 48  * |  1  1 || 1
   2 |  * 12 |  2  0 || 1
-----+-------+-------++--
   3 |  2  1 | 24  * || 1
   3 |  3  0 |  * 16 || 1
-----+-------+-------++--
 12 | 24  6 | 12  8 || 2

(Type B)

  24 |  4  1 |  3 2 || 1
-----+-------+------++--
   2 | 48  * |  1 1 || 1
   2 |  * 12 |  2 0 || 1
-----+-------+------++--
   3 |  2  1 | 24 * || 1
   6 |  6  0 |  * 8 || 2
-----+-------+------++--
 12 | 24  6 | 12 8 || 2

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