# Hendecagonal-small hendecagrammic duoprism

(Redirected from 11-11/2 duoprism)
Hendecagonal-small hendecagrammic duoprism
Rank4
TypeUniform
SpaceSpherical
Info
Coxeter diagramx11o x11/2o
SymmetryI2(11)×I2(11), order 484
ArmySemi-uniform handip
Elements
Vertex figureDigonal disphenoid, edge lengths 2cos(π/11) (base 1), 2cos(2π/11) (base 2), 2 (sides)
Cells11 hendecagonal prisms, 11 small hendecagrammic prisms
Faces121 squares, 11 hendecagons, 11 small hendecagrams
Edges121+121
Vertices121
Measures (edge length 1)
Circumradius${\displaystyle \sqrt{\frac{4\cos^2\frac{\pi}{11}+1}{4\sin^2\frac{2\pi}{11}}}≈2.00125}$
Hypervolume121/32*[cot2(π/11)–1] ≈ 40.07636
Dichoral angles11p–11–11p: 7π/11 ≈ 114.54545°
11/2p–11/2–11/2p: 9π/11 ≈ 147.27273°
11p–4–11/2p: 90°
Central density2
Related polytopes
DualHendecagonal-small hendecagrammic duotegum
ConjugatesHendecagonal-hendecagrammic duoprism, Hendecagonal-great hendecagrammic duoprism, Hendecagonal-grand hendecagrammic duoprism, Small hendecagrammic-hendecagrammic duoprism, Small hendecagrammic-great hendecagrammic duoprism, Small hendecagrammic-grand hendecagrammic duoprism, Hendecagrammic-great hendecagrammic duoprism, Hendecagrammic-grand hendecagrammic duoprism, Great hendecagrammic-grand hendecagrammic duoprism
Properties
ConvexNo
OrientableYes
NatureTame

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

## Vertex coordinates

The coordinates of a hendecagonal-small hendecagrammic duoprism, centered at the origin and with edge length 4sin(π/11)sin(2π/11), are given by:

• (2sin(π/11), 0, 2sin(2π/11), 0),
• (2sin(π/11), 0, sin(4π/11), ±2sin2(2π/11)),
• (2sin(π/11), 0, 2sin(2π/11)cos(4π/11), ±2sin(2π/11)sin(4π/11)),
• (2sin(π/11), 0, 2sin(2π/11)cos(6π/11), ±2sin(2π/11)sin(6π/11)),
• (2sin(π/11), 0, 2sin(2π/11)cos(8π/11), ±2sin(2π/11)sin(8π/11)),
• (2sin(π/11), 0, 2sin(2π/11)cos(10π/11), ±2sin(2π/11)sin(10π/11)),
• (2sin(π/11)cos(2π/11), ±2sin(π/11)sin(2π/11), 2sin(2π/11), 0),
• (2sin(π/11)cos(2π/11), ±2sin(π/11)sin(2π/11), sin(4π/11), ±2sin2(2π/11)),
• (2sin(π/11)cos(2π/11), ±2sin(π/11)sin(2π/11), 2sin(2π/11)cos(4π/11), ±2sin(2π/11)sin(4π/11)),
• (2sin(π/11)cos(2π/11), ±2sin(π/11)sin(2π/11), 2sin(2π/11)cos(6π/11), ±2sin(2π/11)sin(6π/11)),
• (2sin(π/11)cos(2π/11), ±2sin(π/11)sin(2π/11), 2sin(2π/11)cos(8π/11), ±2sin(2π/11)sin(8π/11)),
• (2sin(π/11)cos(2π/11), ±2sin(π/11)sin(2π/11), 2sin(2π/11)cos(10π/11), ±2sin(2π/11)sin(10π/11)),
• (2sin(π/11)cos(4π/11), ±2sin(π/11)sin(4π/11), 2sin(2π/11), 0),
• (2sin(π/11)cos(4π/11), ±2sin(π/11)sin(4π/11), sin(4π/11), ±2sin2(2π/11)),
• (2sin(π/11)cos(4π/11), ±2sin(π/11)sin(4π/11), 2sin(2π/11)cos(4π/11), ±2sin(2π/11)sin(4π/11)),
• (2sin(π/11)cos(4π/11), ±2sin(π/11)sin(4π/11), 2sin(2π/11)cos(6π/11), ±2sin(2π/11)sin(6π/11)),
• (2sin(π/11)cos(4π/11), ±2sin(π/11)sin(4π/11), 2sin(2π/11)cos(8π/11), ±2sin(2π/11)sin(8π/11)),
• (2sin(π/11)cos(4π/11), ±2sin(π/11)sin(4π/11), 2sin(2π/11)cos(10π/11), ±2sin(2π/11)sin(10π/11)),
• (2sin(π/11)cos(6π/11), ±2sin(π/11)sin(6π/11), 2sin(2π/11), 0),
• (2sin(π/11)cos(6π/11), ±2sin(π/11)sin(6π/11), sin(4π/11), ±2sin2(2π/11)),
• (2sin(π/11)cos(6π/11), ±2sin(π/11)sin(6π/11), 2sin(2π/11)cos(4π/11), ±2sin(2π/11)sin(4π/11)),
• (2sin(π/11)cos(6π/11), ±2sin(π/11)sin(6π/11), 2sin(2π/11)cos(6π/11), ±2sin(2π/11)sin(6π/11)),
• (2sin(π/11)cos(6π/11), ±2sin(π/11)sin(6π/11), 2sin(2π/11)cos(8π/11), ±2sin(2π/11)sin(8π/11)),
• (2sin(π/11)cos(6π/11), ±2sin(π/11)sin(6π/11), 2sin(2π/11)cos(10π/11), ±2sin(2π/11)sin(10π/11)),
• (2sin(π/11)cos(8π/11), ±2sin(π/11)sin(8π/11), 2sin(2π/11), 0),
• (2sin(π/11)cos(8π/11), ±2sin(π/11)sin(8π/11), sin(4π/11), ±2sin2(2π/11)),
• (2sin(π/11)cos(8π/11), ±2sin(π/11)sin(8π/11), 2sin(2π/11)cos(4π/11), ±2sin(2π/11)sin(4π/11)),
• (2sin(π/11)cos(8π/11), ±2sin(π/11)sin(8π/11), 2sin(2π/11)cos(6π/11), ±2sin(2π/11)sin(6π/11)),
• (2sin(π/11)cos(8π/11), ±2sin(π/11)sin(8π/11), 2sin(2π/11)cos(8π/11), ±2sin(2π/11)sin(8π/11)),
• (2sin(π/11)cos(8π/11), ±2sin(π/11)sin(8π/11), 2sin(2π/11)cos(10π/11), ±2sin(2π/11)sin(10π/11)),
• (2sin(π/11)cos(10π/11), ±2sin(π/11)sin(10π/11), 2sin(2π/11), 0),
• (2sin(π/11)cos(10π/11), ±2sin(π/11)sin(10π/11), sin(4π/11), ±2sin2(2π/11)),
• (2sin(π/11)cos(10π/11), ±2sin(π/11)sin(10π/11), 2sin(2π/11)cos(4π/11), ±2sin(2π/11)sin(4π/11)),
• (2sin(π/11)cos(10π/11), ±2sin(π/11)sin(10π/11), 2sin(2π/11)cos(6π/11), ±2sin(2π/11)sin(6π/11)),
• (2sin(π/11)cos(10π/11), ±2sin(π/11)sin(10π/11), 2sin(2π/11)cos(8π/11), ±2sin(2π/11)sin(8π/11)),
• (2sin(π/11)cos(10π/11), ±2sin(π/11)sin(10π/11), 2sin(2π/11)cos(10π/11), ±2sin(2π/11)sin(10π/11)).