|Bowers style acronym||Hendep|
|Coxeter diagram||xo11xx ox11xx&#zy|
|Cells||121 tetragonal disphenoids, 242 wedges, 121 rectangular trapezoprisms, 22+22 hendecagonal prisms|
|Faces||484 isosceles triangles, 484 isosceles trapezoids, 242+242 rectangles, 44 hendecagons|
|Vertex figure||Mirror-symmetric triangular antiprism|
|Measures (based on two hendecagonal-icosidigonal duoprisms of edge length 1)|
|Edge lengths||Edges of duoprisms (242+242+484): 1|
|Lacing edges (484):|
|Abstract & topological properties|
|Symmetry||I2(11)≀S2, order 968|
The hendecagonal duoexpandoprism or hendep is a convex isogonal polychoron and the tenth member of the duoexpandoprism family. It consists of 44 hendecagonal prisms of two kinds, 121 rectangular trapezoprisms, 242 wedges, and 121 tetragonal disphenoids. 2 hendecagonal prisms, 1 tetragonal disphenoid, 3 wedges, and 2 rectangular trapezoprisms join at each vertex. It can be obtained as the convex hull of two orthogonal hendecagonal-icosidigonal duoprisms, or more generally hendecagonal-dihendecagonal duoprisms, and a subset of its variations can be obtained by expanding the cells of the hendecagonal duoprism outward. However, it cannot be made uniform.
Using the ratio method, the lowest possible ratio between the longest and shortest edges is .