Acronym ditdidap Name ditrigonal-dodecadodecahedron antiprism Cross sections ` ©` Circumradius sqrt[(27+sqrt(5))/32] = 0.955838 Colonel of regiment sidtidap Externallinks

As abstract polytope ditdidap is automorph, thereby interchanging the roles of pentagrams and pentagons, resp. of stap and pap

It occurs as the blend of sidtidap and gidtidap, blending out all their lacing tets.

Incidence matrix

```ditdid || gyro ditdid   → height = (1+sqrt(5))/4 = 0.809017

20  * |  6  3  0 |  3  3  6  3  0  0 | 1  3  3 0
* 20 |  0  3  6 |  0  0  3  6  3  3 | 0  3  3 1
------+----------+-------------------+----------
2  0 | 60  *  * |  1  1  1  0  0  0 | 1  1  1 0
1  1 |  * 60  * |  0  0  2  2  0  0 | 0  2  2 0
0  2 |  *  * 60 |  0  0  0  1  1  1 | 0  1  1 1
------+----------+-------------------+-----------
5  0 |  5  0  0 | 12  *  *  *  *  * | 1  1  0 0  {5}
5  0 |  5  0  0 |  * 12  *  *  *  * | 1  0  1 0  {5/2}
2  1 |  1  2  0 |  *  * 60  *  *  * | 0  1  1 0
1  2 |  0  2  1 |  *  *  * 60  *  * | 0  1  1 0
0  5 |  0  0  5 |  *  *  *  * 12  * | 0  1  0 1  {5}
0  5 |  0  0  5 |  *  *  *  *  * 12 | 0  0  1 1  {5/2}
------+----------+-------------------+----------
20  0 | 60  0  0 | 12 12  0  0  0  0 | 1  *  * *  ditdid
5  5 |  5 10  5 |  1  0  5  5  1  0 | * 12  * *  pap
5  5 |  5 10  5 |  0  1  5  5  0  1 | *  * 12 *  stap
0 20 |  0  0 60 |  0  0  0  0 12 12 | *  *  * 1  ditdid
```
```or
40 |   6  3 |  3  3   9 | 1  3  3
---+--------+-----------+--------
2 | 120  * |  1  1   1 | 1  1  1
2 |   * 60 |  0  0   4 | 0  2  2
---+--------+-----------+--------
5 |   5  0 | 24  *   * | 1  1  0  {5}
5 |   5  0 |  * 24   * | 1  0  1  {5/2}
3 |   1  2 |  *  * 120 | 0  1  1
---+--------+-----------+--------
20 |  60  0 | 12 12   0 | 2  *  *  ditdid
10 |  10 10 |  2  0  10 | * 12  *  pap
10 |  10 10 |  0  2  10 | *  * 12  stap
```