Hendecagonal duoprism

The hendecagonal duoprism or hendip, also known as the hendecagonal-hendecagonal duoprism, the 11 duoprism or the 11-11 duoprism, is a noble uniform duoprism that consists of 22 hendecagonal prisms, with 4 joining at each vertex. It is also the 22-10 gyrochoron. It is the first in an infinite family of isogonal hendecagonal dihedral swirlchora and also the first in an infinite family of isochoric hendecagonal hosohedral swirlchora.

Vertex coordinates
The coordinates of a hendecagonal duoprism, centered at the origin and with edge length 2sin(π/11), are given by:
 * (1, 0, 1, 0),
 * (1, 0, cos(2π/11), ±sin(2π/11)),
 * (1, 0, cos(4π/11), ±sin(4π/11)),
 * (1, 0, cos(6π/11), ±sin(6π/11)),
 * (1, 0, cos(8π/11), ±sin(8π/11)),
 * (1, 0, cos(10π/11), ±sin(10π/11)),
 * (cos(2π/11), ±sin(2π/11), 1, 0),
 * (cos(2π/11), ±sin(2π/11), cos(2π/11), ±sin(2π/11)),
 * (cos(2π/11), ±sin(2π/11), cos(4π/11), ±sin(4π/11)),
 * (cos(2π/11), ±sin(2π/11), cos(6π/11), ±sin(6π/11)),
 * (cos(2π/11), ±sin(2π/11), cos(8π/11), ±sin(8π/11)),
 * (cos(2π/11), ±sin(2π/11), cos(10π/11), ±sin(10π/11)),
 * (cos(4π/11), ±sin(4π/11), 1, 0),
 * (cos(4π/11), ±sin(4π/11), cos(2π/11), ±sin(2π/11)),
 * (cos(4π/11), ±sin(4π/11), cos(4π/11), ±sin(4π/11)),
 * (cos(4π/11), ±sin(4π/11), cos(6π/11), ±sin(6π/11)),
 * (cos(4π/11), ±sin(4π/11), cos(8π/11), ±sin(8π/11)),
 * (cos(4π/11), ±sin(4π/11), cos(10π/11), ±sin(10π/11)),
 * (cos(6π/11), ±sin(6π/11), 1, 0),
 * (cos(6π/11), ±sin(6π/11), cos(2π/11), ±sin(2π/11)),
 * (cos(6π/11), ±sin(6π/11), cos(4π/11), ±sin(4π/11)),
 * (cos(6π/11), ±sin(6π/11), cos(6π/11), ±sin(6π/11)),
 * (cos(6π/11), ±sin(6π/11), cos(8π/11), ±sin(8π/11)),
 * (cos(6π/11), ±sin(6π/11), cos(10π/11), ±sin(10π/11)),
 * (cos(8π/11), ±sin(8π/11), 1, 0),
 * (cos(8π/11), ±sin(8π/11), cos(2π/11), ±sin(2π/11)),
 * (cos(8π/11), ±sin(8π/11), cos(4π/11), ±sin(4π/11)),
 * (cos(8π/11), ±sin(8π/11), cos(6π/11), ±sin(6π/11)),
 * (cos(8π/11), ±sin(8π/11), cos(8π/11), ±sin(8π/11)),
 * (cos(8π/11), ±sin(8π/11), cos(10π/11), ±sin(10π/11)),
 * (cos(10π/11), ±sin(10π/11), 1, 0),
 * (cos(10π/11), ±sin(10π/11), cos(2π/11), ±sin(2π/11)),
 * (cos(10π/11), ±sin(10π/11), cos(4π/11), ±sin(4π/11)),
 * (cos(10π/11), ±sin(10π/11), cos(6π/11), ±sin(6π/11)),
 * (cos(10π/11), ±sin(10π/11), cos(8π/11), ±sin(8π/11)),
 * (cos(10π/11), ±sin(10π/11), cos(10π/11), ±sin(10π/11)).