Acronym	etcu, J18
Name	elongated triangular cupola
	© ©
Vertex figures	[(3,4)2], [3,43], [42,6]
General of army	(is itself convex)
Colonel of regiment	(is itself locally convex)
Dihedral angles	between {3} and {4} (at tricu,hip-join):   arccos[-sqrt(8)/3] = 160.528779° between {4} and {4} (at tricu,hip-join):   arccos[-sqrt(2/3)] = 144.735610° between {3} and {4} (at tricu lacings):   arccos[-1/sqrt(3)] = 125.264390° between {4} and {4} (at hip lacings):   120° between {4} and {6}:   90°
Face vector	15, 27, 14
Confer	uniform relative: co   hip   related Johnson solids: tricu   etobcu   etigybcu   general polytopal classes: Johnson solids   bistratic lace towers
External links

Incidence matrix according to Dynkin symbol

xxx3oxx&#xt   → height(1,2) = sqrt(2/3) = 0.816497
                height(2,3) = 1
({3} || pseudo {6} || {6})

o..3o..    | 3 * * | 2 2 0 0 0 0 0 | 1 2 1 0 0 0
.o.3.o.    | * 6 * | 0 1 1 1 1 0 0 | 0 1 1 1 1 0
..o3..o    | * * 6 | 0 0 0 0 1 1 1 | 0 0 0 1 1 1
-----------+-------+---------------+------------
x.. ...    | 2 0 0 | 3 * * * * * * | 1 1 0 0 0 0
oo.3oo.&#x | 1 1 0 | * 6 * * * * * | 0 1 1 0 0 0
.x. ...    | 0 2 0 | * * 3 * * * * | 0 1 0 1 0 0
... .x.    | 0 2 0 | * * * 3 * * * | 0 0 1 0 1 0
.oo3.oo&#x | 0 1 1 | * * * * 6 * * | 0 0 0 1 1 0
..x ...    | 0 0 2 | * * * * * 3 * | 0 0 0 1 0 1
... ..x    | 0 0 2 | * * * * * * 3 | 0 0 0 0 1 1
-----------+-------+---------------+------------
x..3o..    | 3 0 0 | 3 0 0 0 0 0 0 | 1 * * * * *
xx. ...&#x | 2 2 0 | 1 2 1 0 0 0 0 | * 3 * * * *
... ox.&#x | 1 2 0 | 0 2 0 1 0 0 0 | * * 3 * * *
.xx ...&#x | 0 2 2 | 0 0 1 0 2 1 0 | * * * 3 * *
... .xx&#x | 0 2 2 | 0 0 0 1 2 0 1 | * * * * 3 *
..x3..x    | 0 0 6 | 0 0 0 0 0 3 3 | * * * * * 1