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x o     o x
           
           
    x x    

Incidence matrix according to Dynkin symbol

xxo oxx&#q   → height(1,2) = height(2,3) = sqrt(7)/2 = 1.322876
               height(1,3) = sqrt(3/2) = 1.224745

o.. o..    | 2 * * | 1 2 2 0 0 0 0 | 2 1 2 1 2 0 0 0 | 1 1 2 1 0
.o. .o.    | * 4 * | 0 1 0 1 1 1 0 | 1 1 0 0 1 1 1 1 | 1 0 1 1 1
..o ..o    | * * 2 | 0 0 2 0 0 2 1 | 0 0 1 2 2 0 1 2 | 0 1 1 2 1
-----------+-------+---------------+-----------------+----------
x.. ...    | 2 0 0 | 1 * * * * * * | 2 0 2 0 0 0 0 0 | 1 1 2 0 0
oo. oo.&#q | 1 1 0 | * 4 * * * * * | 1 1 0 0 1 0 0 0 | 1 0 1 1 0
o.o o.o&#q | 1 0 1 | * * 4 * * * * | 0 0 1 1 1 0 0 0 | 0 1 1 1 0
.x. ...    | 0 2 0 | * * * 2 * * * | 1 0 0 0 0 1 1 0 | 1 0 1 0 1
... .x.    | 0 2 0 | * * * * 2 * * | 0 1 0 0 0 1 0 1 | 1 0 0 1 1
.oo .oo&#q | 0 1 1 | * * * * * 4 * | 0 0 0 0 1 0 1 1 | 0 0 1 1 1
... ..x    | 0 0 2 | * * * * * * 1 | 0 0 0 2 0 0 0 2 | 0 1 0 2 1
-----------+-------+---------------+-----------------+----------
xx. ...&#q | 2 2 0 | 1 2 0 1 0 0 0 | 2 * * * * * * * | 1 0 1 0 0
... ox.&#q | 1 2 0 | 0 2 0 0 1 0 0 | * 2 * * * * * * | 1 0 0 1 0
x.o ...&#q | 2 0 1 | 1 0 2 0 0 0 0 | * * 2 * * * * * | 0 1 1 0 0
... o.x&#q | 1 0 2 | 0 0 2 0 0 0 1 | * * * 2 * * * * | 0 1 0 1 0
ooo ooo&#q | 1 1 1 | 0 1 1 0 0 1 0 | * * * * 4 * * * | 0 0 1 1 0
.x. .x.    | 0 4 0 | 0 0 0 2 2 0 0 | * * * * * 1 * * | 1 0 0 0 1
.xo ...&#q | 0 2 1 | 0 0 0 1 0 2 0 | * * * * * * 2 * | 0 0 1 0 1
... .xx&#q | 0 2 2 | 0 0 0 0 1 2 1 | * * * * * * * 2 | 0 0 0 1 1
-----------+-------+---------------+-----------------+----------
xx. ox.&#q ♦ 2 4 0 | 1 4 0 2 2 0 0 | 2 2 0 0 0 1 0 0 | 1 * * * *
x.o o.x&#q ♦ 2 0 2 | 1 0 4 0 0 0 1 | 0 0 2 2 0 0 0 0 | * 1 * * *
xxo ...&#q ♦ 2 2 1 | 1 2 2 1 0 2 0 | 1 0 1 0 2 0 1 0 | * * 2 * *
... oxx&#q ♦ 1 2 2 | 0 2 2 0 1 2 1 | 0 1 0 1 2 0 0 1 | * * * 2 *
.xo .xx&#q ♦ 0 4 2 | 0 0 0 2 2 4 1 | 0 0 0 0 0 1 2 2 | * * * * 1