Acronym trid
Name triangle - icosidodecahedron duoprism
Circumradius sqrt[(11+3 sqrt(5))/6] = 1.717954
Confer
more general:
n,id-dip  
general polytopal classes:
segmentotera  

Incidence matrix according to Dynkin symbol

x3o o3x5o

. . . . . | 90 |  2   4 |  1   8  2  2 |  4  4  4 1 |  2  2 2
----------+----+--------+--------------+------------+--------
x . . . . |  2 | 90   * |  1   4  0  0 |  4  2  2 0 |  2  2 1
. . . x . |  2 |  * 180 |  0   2  1  1 |  1  2  2 1 |  1  1 2
----------+----+--------+--------------+------------+--------
x3o . . . |  3 |  3   0 | 30   *  *  * |  4  0  0 0 |  2  2 0
x . . x . |  4 |  2   2 |  * 180  *  * |  1  1  1 0 |  1  1 1
. . o3x . |  3 |  0   3 |  *   * 60  * |  0  2  0 1 |  1  0 2
. . . x5o |  5 |  0   5 |  *   *  * 36 |  0  0  2 1 |  0  1 2
----------+----+--------+--------------+------------+--------
x3o . x .   6 |  6   3 |  2   3  0  0 | 60  *  * * |  1  1 0
x . o3x .   6 |  3   6 |  0   3  2  0 |  * 60  * * |  1  0 1
x . . x5o  10 |  5  10 |  0   5  0  2 |  *  * 36 * |  0  1 1
. . o3x5o  30 |  0  60 |  0   0 20 12 |  *  *  * 3 |  0  0 2
----------+----+--------+--------------+------------+--------
x3o o3x .   9 |  9   9 |  3   9  3  0 |  3  3  0 0 | 20  * *
x3o . x5o  15 | 15  15 |  5  15  0  3 |  5  0  3 0 |  * 12 *
x . o3x5o  60 | 30 120 |  0  60 40 24 |  0 20 12 2 |  *  * 3

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