Enneagonal-hendecagonal duoprism

The enneagonal-hendecagonal duoprism or ehendip, also known as the 9-11 duoprism, is a uniform duoprism that consists of 9 hendecagonal prisms and 11 enneagonal prisms, with two ofe each joining at each vertex.

Vertex coordinates
The coordinates of an enneagonal-hendecagonal duoprism, centered at the origin and with edge length 4sin(π/9)sin(π/11), are given by:
 * (2sin(π/11), 0, 2sin(π/9), 0),
 * (2sin(π/11), 0, 2sin(π/9)cos(2π/11), ±2sin(π/9)sin(2π/11)),
 * (2sin(π/11), 0, 2sin(π/9)cos(4π/11), ±2sin(π/9)sin(4π/11)),
 * (2sin(π/11), 0, 2sin(π/9)cos(6π/11), ±2sin(π/9)sin(6π/11)),
 * (2sin(π/11), 0, 2sin(π/9)cos(8π/11), ±2sin(π/9)sin(8π/11)),
 * (2sin(π/11), 0, 2sin(π/9)cos(10π/11), ±2sin(π/9)sin(10π/11)),
 * (2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9), 2sin(π/9), 0),
 * (2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9), 2sin(π/9)cos(2π/11), ±2sin(π/9)sin(2π/11)),
 * (2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9), 2sin(π/9)cos(4π/11), ±2sin(π/9)sin(4π/11)),
 * (2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9), 2sin(π/9)cos(6π/11), ±2sin(π/9)sin(6π/11)),
 * (2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9), 2sin(π/9)cos(8π/11), ±2sin(π/9)sin(8π/11)),
 * (2sin(π/11)cos(2π/9), ±2sin(π/11)sin(2π/9), 2sin(π/9)cos(10π/11), ±2sin(π/9)sin(10π/11)),
 * (2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9), 2sin(π/9), 0),
 * (2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9), 2sin(π/9)cos(2π/11), ±2sin(π/9)sin(2π/11)),
 * (2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9), 2sin(π/9)cos(4π/11), ±2sin(π/9)sin(4π/11)),
 * (2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9), 2sin(π/9)cos(6π/11), ±2sin(π/9)sin(6π/11)),
 * (2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9), 2sin(π/9)cos(8π/11), ±2sin(π/9)sin(8π/11)),
 * (2sin(π/11)cos(4π/9), ±2sin(π/11)sin(4π/9), 2sin(π/9)cos(10π/11), ±2sin(π/9)sin(10π/11)),
 * (–sin(π/11), ±sin(π/11)$\sqrt{2}$, 2sin(π/9), 0),
 * (–sin(π/11), ±sin(π/11)$\sqrt{3}$, 2sin(π/9)cos(2π/11), ±2sin(π/9)sin(2π/11)),
 * (–sin(π/11), ±sin(π/11)$\sqrt{3}$, 2sin(π/9)cos(4π/11), ±2sin(π/9)sin(4π/11)),
 * (–sin(π/11), ±sin(π/11)$\sqrt{3}$, 2sin(π/9)cos(6π/11), ±2sin(π/9)sin(6π/11)),
 * (–sin(π/11), ±sin(π/11)$\sqrt{3}$, 2sin(π/9)cos(8π/11), ±2sin(π/9)sin(8π/11)),
 * (–sin(π/11), ±sin(π/11)$\sqrt{3}$, 2sin(π/9)cos(10π/11), ±2sin(π/9)sin(10π/11)),
 * (2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9), 2sin(π/9), 0),
 * (2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9), 2sin(π/9)cos(2π/11), ±2sin(π/9)sin(2π/11)),
 * (2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9), 2sin(π/9)cos(4π/11), ±2sin(π/9)sin(4π/11)),
 * (2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9), 2sin(π/9)cos(6π/11), ±2sin(π/9)sin(6π/11)),
 * (2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9), 2sin(π/9)cos(8π/11), ±2sin(π/9)sin(8π/11)),
 * (2sin(π/11)cos(8π/9), ±2sin(π/11)sin(8π/9), 2sin(π/9)cos(10π/11), ±2sin(π/9)sin(10π/11)).