Acronym epedpy, J16 Name elongated pentagonal dipyramid ` © ©` Vertex figure [35], [32,42] General of army (is itself convex) Colonel of regiment (is itself locally convex) Confer related Johnson solids: peppy   epeppy   uniform relative: pip   general polytopal classes: Johnson solids Externallinks

Incidence matrix according to Dynkin symbol

```oxxo5oooo&#xt   → height(1,2) = height(3,4) = sqrt((5-sqrt(5))/10) = 0.525731
height(2,3) = 1
(pt || pseudo {5} || pseudo {5} || pt)

o...5o...    | 1 * * * | 5 0 0 0 0 | 5 0 0
.o..5.o..    | * 5 * * | 1 2 1 0 0 | 2 2 0
..o.5..o.    | * * 5 * | 0 0 1 2 1 | 0 2 2
...o5...o    | * * * 1 | 0 0 0 0 5 | 0 0 5
-------------+---------+-----------+------
oo..5oo..&#x | 1 1 0 0 | 5 * * * * | 2 0 0
.x.. ....    | 0 2 0 0 | * 5 * * * | 1 1 0
.oo.5.oo.&#x | 0 1 1 0 | * * 5 * * | 0 2 0
..x. ....    | 0 0 2 0 | * * * 5 * | 0 1 1
..oo5..oo&#x | 0 0 1 1 | * * * * 5 | 0 0 2
-------------+---------+-----------+------
ox.. ....&#x | 1 2 0 0 | 2 1 0 0 0 | 5 * *
.xx. ....&#x | 0 2 2 0 | 0 1 2 1 0 | * 5 *
..xo ....&#x | 0 0 2 1 | 0 0 0 1 2 | * * 5
```
```or
o...5o...    & | 2  * |  5  0 0 |  5 0
.o..5.o..    & | * 10 |  1  2 1 |  2 2
---------------+------+---------+-----
oo..5oo..&#x & | 1  1 | 10  * * |  2 0
.x.. ....    & | 0  2 |  * 10 * |  1 1
.oo.5.oo.&#x   | 0  2 |  *  * 5 |  0 2
---------------+------+---------+-----
ox.. ....&#x & | 1  2 |  2  1 0 | 10 *
.xx. ....&#x   | 0  4 |  0  2 2 |  * 5
```