Acronym	ux
Name	hendecaxennon, undecaxennon, 10D simplex (α10), pyroxennon, decayottal pyramid
Circumradius	sqrt(5/11) = 0.674200
Inradius	sqrt(4/33) = 0.348155
Dual	(selfdual, in different orientation)
Confer	general polytopal classes: simplex
External links

Incidence matrix according to Dynkin symbol

x3o3o3o3o3o3o3o3o3o

. . . . . . . . . . | 11 ♦ 10 |  45 | 120 | 210 | 252 | 210 | 120 | 45 | 10
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x . . . . . . . . . |  2 | 55 ♦   9 |  36 |  84 | 126 | 126 |  84 | 36 |  9
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o . . . . . . . . |  3 |  3 | 165 ♦   8 |  28 |  56 |  70 |  56 | 28 |  8
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o . . . . . . . ♦  4 |  6 |   4 | 330 ♦   7 |  21 |  35 |  35 | 21 |  7
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o3o . . . . . . ♦  5 | 10 |  10 |   5 | 462 ♦   6 |  15 |  20 | 15 |  6
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o3o3o . . . . . ♦  6 | 15 |  20 |  15 |   6 | 462 ♦   5 |  10 | 10 |  5
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o3o3o3o . . . . ♦  7 | 21 |  35 |  35 |  21 |   7 | 330 ♦   4 |  6 |  4
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o3o3o3o3o . . . ♦  8 | 28 |  56 |  70 |  56 |  28 |   8 | 165 |  3 |  3
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o3o3o3o3o3o . . ♦  9 | 36 |  84 | 126 | 126 |  84 |  36 |   9 | 55 |  2
--------------------+----+----+-----+-----+-----+-----+-----+-----+----+---
x3o3o3o3o3o3o3o3o . ♦ 10 | 45 | 120 | 210 | 252 | 210 | 120 |  45 | 10 | 11