Acronym dri Name dirhombicosahedron,compound of 20 trip ` © ` Circumradius sqrt(7/12) = 0.763763 Vertex figure [3,42] General of army x3f5o Colonel of regiment (itself, although not being locally convex) Externallinks

Both, vertices and triangle planes, coincide by pairs. So either both can be considered separately (type A), or vertices are identified while triangles are considered separately (type B), or those faces are considered as (regular) 2-triangle-compounds while coincident vertices are taken separately (type C), or both are pairwise combined (type D).

Finally, instead of considering individual trip, it can likewise be seen as a compound of 2 (different handed) kri (type E).

Incidence matrix

```(Type A)

120 |   2  1 |  2  1 ||  1
----+--------+-------++---
2 | 120  * |  1  1 ||  1
2 |   * 60 |  2  0 ||  1
----+--------+-------++---
4 |   2  2 | 60  * ||  1
3 |   3  0 |  * 40 ||  1
----+--------+-------++---
♦ 6 |   6  3 |  3  2 || 20
```

```(Type B)

60 |   4  2 |  4  2 ||  2
----+--------+-------++---
2 | 120  * |  1  1 ||  1
2 |   * 60 |  2  0 ||  1
----+--------+-------++---
4 |   2  2 | 60  * ||  1
3 |   3  0 |  * 40 ||  1
----+--------+-------++---
♦ 6 |   6  3 |  3  2 || 20
```

```(Type C)

120 |   2  1 |  2  1 ||  1
----+--------+-------++---
2 | 120  * |  1  1 ||  1
2 |   * 60 |  2  0 ||  1
----+--------+-------++---
4 |   2  2 | 60  * ||  1
6 |   6  0 |  * 20 ||  2
----+--------+-------++---
♦ 6 |   6  3 |  3  2 || 20
```

```(Type D)

60 |   4  2 |  4  2 ||  2
----+--------+-------++---
2 | 120  * |  1  1 ||  1
2 |   * 60 |  2  0 ||  1
----+--------+-------++---
4 |   2  2 | 60  * ||  1
6 |   6  0 |  * 20 ||  2
----+--------+-------++---
♦ 6 |   6  3 |  3  2 || 20
```

```(Type E)

120 |   2  1 |  2  1 || 1
-----+--------+-------++--
2 | 120  * |  1  1 || 1
2 |   * 60 |  2  0 || 1
-----+--------+-------++--
4 |   2  2 | 60  * || 1
3 |   3  0 |  * 40 || 1
-----+--------+-------++--
♦ 60 |  60 30 | 30 20 || 2
```

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