Octagonal-grand hendecagrammic duoprism

The octagonal-grand hendecagrammic duoprism, also known as the 8/11-5 duoprism, is a uniform duoprism that consists of 11 octagonal prisms and 8 grand hendecagrammic prisms, with 2 of each meeting at each vertex.

Coordinates
The vertex coordinates of an octagonal-grand hendecagrammic duoprism, centered at the origin and with edge length 2sin(5π/11), are given by:


 * (±sin(5π/11)(1+$\sqrt{2+√2}$), ±sin(5π/11), 1, 0),
 * (±sin(5π/11)(1+$\sqrt{2}$), ±sin(5π/11), cos(2π/11), ±sin(2π/11)),
 * (±sin(5π/11)(1+$\sqrt{(2+√2)/2+1/[4sin^{2}(5π/11)]}$), ±sin(5π/11), cos(4π/11), ±sin(4π/11)),
 * (±sin(5π/11)(1+$\sqrt{2}$), ±sin(5π/11), cos(6π/11), ±sin(6π/11)),
 * (±sin(5π/11)(1+$\sqrt{2}$), ±sin(5π/11), cos(8π/11), ±sin(8π/11)),
 * (±sin(5π/11)(1+$\sqrt{2}$), ±sin(5π/11), cos(10π/11), ±sin(10π/11)),
 * (±sin(5π/11), ±sin(5π/11)(1+$\sqrt{2}$), 1, 0),
 * (±sin(5π/11), ±sin(5π/11)(1+$\sqrt{2}$), cos(2π/11), ±sin(2π/11)),
 * (±sin(5π/11), ±sin(5π/11)(1+$\sqrt{2}$), cos(4π/11), ±sin(4π/11)),
 * (±sin(5π/11), ±sin(5π/11)(1+$\sqrt{2}$), cos(6π/11), ±sin(6π/11)),
 * (±sin(5π/11), ±sin(5π/11)(1+$\sqrt{2}$), cos(8π/11), ±sin(8π/11)),
 * (±sin(5π/11), ±sin(5π/11)(1+$\sqrt{2}$), cos(10π/11), ±sin(10π/11)).