Enneagrammic-hendecagonal duoprism

The enneagrammic-hendecagonal duoprism, also known as the 9/2-11 duoprism, is a uniform duoprism that consists of 11 enneagrammic prisms and 9 hendecagonal prisms, with 2 of each meeting at each vertex.

The name can also refer to the great enneagrammic-hendecagonal duoprism.

Coordinates
The vertex coordinates of an enneagrammic-hendecagonal duoprism, centered at the origin and with edge length 4sin(2π/9)sin(π/11), are given by:


 * (2sin(2π/9), 0, 2sin(π/11), 0),
 * (2sin(2π/9), 0, 2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9)),
 * (2sin(2π/9), 0, 2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9)),
 * (2sin(2π/9), 0, –sin(π/11), ±sin(π/11)$\sqrt{2}$),
 * (2sin(2π/9), 0, 2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9)),
 * (2sin(2π/9)cos(2π/11), ±2sin(2π/9)sin(2π/11), 2sin(π/11), 0),
 * (2sin(2π/9)cos(2π/11), ±2sin(2π/9)sin(2π/11), 2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9)),
 * (2sin(2π/9)cos(2π/11), ±2sin(2π/9)sin(2π/11), 2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9)),
 * (2sin(2π/9)cos(2π/11), ±2sin(2π/9)sin(2π/11), –sin(π/11), ±sin(π/11)$\sqrt{1/[4sin^{2}(2π/9)]+1/[4sin^{2}(π/11)]}$),
 * (2sin(2π/9)cos(2π/11), ±2sin(2π/9)sin(2π/11), 2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9)),
 * (2sin(2π/9)cos(4π/11), ±2sin(2π/9)sin(4π/11), 2sin(π/11), 0),
 * (2sin(2π/9)cos(4π/11), ±2sin(2π/9)sin(4π/11), 2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9)),
 * (2sin(2π/9)cos(4π/11), ±2sin(2π/9)sin(4π/11), 2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9)),
 * (2sin(2π/9)cos(4π/11), ±2sin(2π/9)sin(4π/11), –sin(π/11), ±sin(π/11)$\sqrt{3}$),
 * (2sin(2π/9)cos(4π/11), ±2sin(2π/9)sin(4π/11), 2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9)),
 * (2sin(2π/9)cos(6π/11), ±2sin(2π/9)sin(6π/11), 2sin(π/11), 0),
 * (2sin(2π/9)cos(6π/11), ±2sin(2π/9)sin(6π/11), 2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9)),
 * (2sin(2π/9)cos(6π/11), ±2sin(2π/9)sin(6π/11), 2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9)),
 * (2sin(2π/9)cos(6π/11), ±2sin(2π/9)sin(6π/11), –sin(π/11), ±sin(π/11)$\sqrt{3}$),
 * (2sin(2π/9)cos(6π/11), ±2sin(2π/9)sin(6π/11), 2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9)),
 * (2sin(2π/9)cos(8π/11), ±2sin(2π/9)sin(8π/11), 2sin(π/11), 0),
 * (2sin(2π/9)cos(8π/11), ±2sin(2π/9)sin(8π/11), 2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9)),
 * (2sin(2π/9)cos(8π/11), ±2sin(2π/9)sin(8π/11), 2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9)),
 * (2sin(2π/9)cos(8π/11), ±2sin(2π/9)sin(8π/11), –sin(π/11), ±sin(π/11)$\sqrt{3}$),
 * (2sin(2π/9)cos(8π/11), ±2sin(2π/9)sin(8π/11), 2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9)),
 * (2sin(2π/9)cos(10π/11), ±2sin(2π/9)sin(10π/11), 2sin(π/11), 0),
 * (2sin(2π/9)cos(10π/11), ±2sin(2π/9)sin(10π/11), 2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9)),
 * (2sin(2π/9)cos(10π/11), ±2sin(2π/9)sin(10π/11), 2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9)),
 * (2sin(2π/9)cos(10π/11), ±2sin(2π/9)sin(10π/11), –sin(π/11), ±sin(π/11)$\sqrt{3}$),
 * (2sin(2π/9)cos(10π/11), ±2sin(2π/9)sin(10π/11), 2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9)).