D   
       
       
p     q

where:
D = pseudo x5/2x (= hollow pentagon)
p = x5/2o
q = o5/2x

Incidence matrix according to Dynkin symbol

reduced( xxo5/2oxx&#x by x5/2x )   → height(1,2) = height(2,3) = sqrt[(5+sqrt(5))/10] = 0.850651
                                     height(1,3) = sqrt[(sqrt(5)-1)/2] = 0.786151

         o..5/2o..      | 5 * * | 2  2  2 0  0 0 | 1 2 1 2 1  2 0 0 0 | 1 1 2 1 0
         .o.5/2.o.      | * 5 * | 0  2  0 2  2 0 | 0 2 2 0 0  2 2 2 0 | 1 0 2 2 1
         ..o5/2..o      | * * 5 | 0  0  2 0  2 2 | 0 0 0 1 2  2 1 2 1 | 0 1 1 2 1
------------------------+-------+----------------+--------------------+----------
         x..   ...      | 2 0 0 | 5  *  * *  * * | 1 1 0 1 0  0 0 0 0 | 1 1 1 0 0
         oo.5/2oo.&#x   | 1 1 0 | * 10  * *  * * | 0 1 1 0 0  1 0 0 0 | 1 0 1 1 0
         o.o5/2o.o&#x   | 1 0 1 | *  * 10 *  * * | 0 0 0 1 1  1 0 0 0 | 0 1 1 1 0
         .x.   ...    & | 0 2 0 | *  *  * 5  * * | 0 1 1 0 0  0 1 1 0 | 1 0 1 1 1
         .oo5/2.oo&#x   | 0 1 1 | *  *  * * 10 * | 0 0 0 0 0  1 1 1 0 | 0 0 1 1 1
         ...   ..x      | 0 0 2 | *  *  * *  * 5 | 0 0 0 0 1  0 0 1 1 | 0 1 0 1 1
------------------------+-------+----------------+--------------------+----------
         x..5/2o..      | 5 0 0 | 5  0  0 0  0 0 | 1 * * * *  * * * * | 1 1 0 0 0
         xx.   ...&#x   | 2 2 0 | 1  2  0 1  0 0 | * 5 * * *  * * * * | 1 0 1 0 0
         ...   ox.&#x   | 1 2 0 | 0  2  0 1  0 0 | * * 5 * *  * * * * | 1 0 0 1 0
         x.o   ...&#x   | 2 0 1 | 1  0  2 0  0 0 | * * * 5 *  * * * * | 0 1 1 0 0
         ...   o.x&#x   | 1 0 2 | 0  0  2 0  0 1 | * * * * 5  * * * * | 0 1 0 1 0
         ooo5/2ooo&#x   | 1 1 1 | 0  1  1 0  1 0 | * * * * * 10 * * * | 0 0 1 1 0
         .xo   ...&#x   | 0 2 1 | 0  0  0 1  2 0 | * * * * *  * 5 * * | 0 0 1 0 1
         ...   .xx&#x   | 0 2 2 | 0  0  0 1  2 1 | * * * * *  * * 5 * | 0 0 0 1 1
         ..o5/2..x      | 0 0 5 | 0  0  0 0  0 5 | * * * * *  * * * 1 | 0 1 0 0 1
------------------------+-------+----------------+--------------------+----------
reduced( xx.5/2ox.&#x ) ♦ 5 5 0 | 5 10  0 5  0 0 | 1 5 5 0 0  0 0 0 0 | 1 * * * *
         x.o5/2o.x&#x   ♦ 5 0 5 | 5  0 10 0  0 5 | 1 0 0 5 5  0 0 0 1 | * 1 * * *
         xxo   ...&#x   ♦ 2 2 1 | 1  2  2 1  2 0 | 0 1 0 1 0  2 1 0 0 | * * 5 * *
         ...   oxx&#x   ♦ 1 2 2 | 0  2  2 1  2 1 | 0 0 1 0 1  2 0 1 0 | * * * 5 *
reduced( .xo5/2.xx&#x ) ♦ 0 5 5 | 0  0  0 5 10 5 | 0 0 0 0 0  0 5 5 1 | * * * * 1

or
         o..5/2o..      & | 10 * |  2  2  2 0 | 1  2  1  3  2 | 1 1  3
         .o.5/2.o.        |  * 5 |  0  4  0 2 | 0  4  4  0  2 | 2 0  4
--------------------------+------+------------+---------------+-------
         x..   ...      & |  2 0 | 10  *  * * | 1  1  0  1  0 | 1 1  1
         oo.5/2oo.&#x   & |  1 1 |  * 20  * * | 0  1  1  0  1 | 1 0  2
         o.o5/2o.o&#x     |  2 0 |  *  * 10 * | 0  0  0  2  1 | 0 1  2
         .x.   ...      & |  0 2 |  *  *  * 5 | 0  2  2  0  0 | 2 0  2
--------------------------+------+------------+---------------+-------
         x..5/2o..      & |  5 0 |  5  0  0 0 | 2  *  *  *  * | 1 1  0
         xx.   ...&#x   & |  2 2 |  1  2  0 1 | * 10  *  *  * | 1 0  1
         ...   ox.&#x   & |  1 2 |  0  2  0 1 | *  * 10  *  * | 1 0  1
         x.o   ...&#x   & |  3 0 |  1  0  2 0 | *  *  * 10  * | 0 1  1
         ooo5/2ooo&#x     |  2 1 |  0  2  1 0 | *  *  *  * 10 | 0 0  2
--------------------------+------+------------+---------------+-------
reduced( xx.5/2ox.&#x ) & ♦  5 5 |  5 10  0 5 | 1  5  5  0  0 | 2 *  *
         x.o5/2o.x&#x     ♦ 10 0 | 10  0 10 0 | 2  0  0 10  0 | * 1  *
         xxo   ...&#x   & ♦  3 2 |  1  4  2 1 | 0  1  1  1  2 | * * 10