Acronym tacpy Name triacontaditeric pyramid,vertex-first rotunda of gee Circumradius 1/sqrt(2) = 0.707107 Lace cityin approx. ASCII-art ``` o where: o = o3o3o4o (point) o H o H = x3o3o4o (hex) ``` ``` o o = o3o3o3o (point) p = x3o3o3o (pen) p P P = o3o3o3x (dual pen) ``` Coordinates (0, 0, 0, 0, 0, 1/sqrt(2)) tip (1/sqrt(2), 0, 0, 0, 0, 0)   & permutations and changes of sign in all but last coordinate hexadecachoron base Dihedral angles at pen between hix and hix:   arccos(-2/3) = 131.810315° at pen between hix and tac:   arccos[1/sqrt(6)] = 65.905157° Confer uniform relative: gee   related segmentopeta: hexasc   octete   squepe   general polytopal classes: segmentopeta   fundamental lace prisms

Incidence matrix according to Dynkin symbol

```ox3oo3oo3oo4oo&#x   → height = 1/sqrt(2) = 0.707107
(pt || tac)

o.3o.3o.3o.4o.    | 1  * ♦ 10  0 | 40  0 | 80  0 | 80  0 | 32 0
.o3.o3.o3.o4.o    | * 10 ♦  1  8 |  8 24 | 24 32 | 32 16 | 16 1
------------------+------+-------+-------+-------+-------+-----
oo3oo3oo3oo4oo&#x | 1  1 | 10  * ♦  8  0 | 24  0 | 32  0 | 16 0
.x .. .. .. ..    | 0  2 |  * 40 ♦  1  6 |  6 12 | 12  8 |  8 1
------------------+------+-------+-------+-------+-------+-----
ox .. .. .. ..&#x | 1  2 |  2  1 | 40  * ♦  6  0 | 12  0 |  8 0
.x3.o .. .. ..    | 0  3 |  0  3 |  * 80 ♦  1  4 |  4  4 |  4 1
------------------+------+-------+-------+-------+-------+-----
ox3oo .. .. ..&#x ♦ 1  3 |  3  3 |  3  1 | 80  * |  4  0 |  4 0
.x3.o3.o .. ..    ♦ 0  4 |  0  6 |  0  4 |  * 80 |  1  2 |  2 1
------------------+------+-------+-------+-------+-------+-----
ox3oo3oo .. ..&#x ♦ 1  4 |  4  6 |  6  4 |  4  1 | 80  * |  2 0
.x3.o3.o3.o ..    ♦ 0  5 |  0 10 |  0 10 |  0  5 |  * 32 |  1 1
------------------+------+-------+-------+-------+-------+-----
ox3oo3oo3oo ..&#x ♦ 1  5 |  5 10 | 10 10 | 10  5 |  5  1 | 32 *
.x3.o3.o3.o4.o    ♦ 0 10 |  0 40 |  0 80 |  0 80 |  0 32 |  * 1
```

```oo3oo3oo *b3oo3ox&#x   → height = 1/sqrt(2) = 0.707107
(pt || tac)

o.3o.3o. *b3o.3o.    | 1  * ♦ 10  0 | 40  0 | 80  0 | 80  0  0 | 16 16 0
.o3.o3.o *b3.o3.o    | * 10 ♦  1  8 |  8 24 | 24 32 | 32  8  8 |  8  8 1
---------------------+------+-------+-------+-------+----------+--------
oo3oo3oo *b3oo3oo&#x | 1  1 | 10  * ♦  8  0 | 24  0 | 32  0  0 |  8  8 0
.. .. ..    .. .x    | 0  2 |  * 40 ♦  1  6 |  6 12 | 12  4  4 |  4  4 1
---------------------+------+-------+-------+-------+----------+--------
.. .. ..    .. ox&#x | 1  2 |  2  1 | 40  * ♦  6  0 | 12  0  0 |  4  4 0
.. .. ..    .o3.x    | 0  3 |  0  3 |  * 80 ♦  1  4 |  4  2  2 |  2  2 1
---------------------+------+-------+-------+-------+----------+--------
.. .. ..    oo3ox&#x ♦ 1  3 |  3  3 |  3  1 | 80  * |  4  0  0 |  2  2 0
.. .o .. *b3.o3.x    ♦ 0  4 |  0  6 |  0  4 |  * 80 |  1  1  1 |  1  1 1
---------------------+------+-------+-------+-------+----------+--------
.. oo .. *b3oo3ox&#x ♦ 1  4 |  4  6 |  6  4 |  4  1 | 80  *  * |  1  1 0
.o3.o .. *b3.o3.x    ♦ 0  5 |  0 10 |  0 10 |  0  5 |  * 16  * |  1  0 1
.. .o3.o *b3.o3.x    ♦ 0  5 |  0 10 |  0 10 |  0  5 |  *  * 16 |  0  1 1
---------------------+------+-------+-------+-------+----------+--------
oo3oo .. *b3oo3ox&#x ♦ 1  5 |  5 10 | 10 10 | 10  5 |  5  1  0 | 16  * *
.. oo3oo *b3oo3ox&#x ♦ 1  5 |  5 10 | 10 10 | 10  5 |  5  0  1 |  * 16 *
.o3.o3.o *b3.o3.x    ♦ 0 10 |  0 40 |  0 80 |  0 80 |  0 16 16 |  *  * 1
```