The triangles {(t,T,T)} have vertex angles t = arccos(2/3) = 48.189685° resp. T = arccos[1/sqrt(6)] = 65.905157°.

Incidence matrix according to Dynkin symbol

oq6oo dx&zh   → height = 0
                where d = 3 (pseudo)

o.6o. o.    | 2  * |  6  0 0 |  6 0  [t6]
.o6.o .o    | * 12 |  1  2 1 |  2 2
------------+------+---------+-----
oo6oo oo&#h | 1  1 | 12  * * |  2 0  h
.q .. ..    | 0  2 |  * 12 * |  1 1  q
.. .. .x    | 0  2 |  *  * 6 |  0 2  x
------------+------+---------+-----
oq .. ..&#h | 1  2 |  2  1 0 | 12 *  {(t,T,T)}
.q .. .x    | 0  4 |  0  2 2 |  * 6

oq3oq dx&zh   → height = 0
                where d = 3 (pseudo)

o.3o. o.    | 2  * |  6 0 0 0 | 3 3 0 0  [t6]
.o3.o .o    | * 12 |  1 1 1 1 | 1 1 1 1
------------+------+----------+--------
oo3oo oo&#h | 1  1 | 12 * * * | 1 1 0 0  h
.q .. ..    | 0  2 |  * 6 * * | 1 0 1 0  q
.. .q ..    | 0  2 |  * * 6 * | 0 1 0 1  q
.. .. .x    | 0  2 |  * * * 6 | 0 0 1 1  x
------------+------+----------+--------
oq .. ..&#h | 1  2 |  2 1 0 0 | 6 * * *  {(t,T,T)}
.. oq ..&#h | 1  2 |  2 0 1 0 | * 6 * *  {(t,T,T)}
.q .. .x    | 0  4 |  0 2 0 2 | * * 3 *
.. .q .x    | 0  4 |  0 0 2 2 | * * * 3