Hendekeract

The hendekeract, also called the 11-cube or icosididakon, is one of the 3 regular polydaka. It has 22 dekeracts as facets, joining 3 to a yotton and 11 to a vertex.

It is the 11-dimensional hypercube.

It can be alternated into a demihendekeract, which is uniform.

Vertex coordinates
The vertices of a dekeract of edge length 1, centered at the origin, are given by:
 * (±1/2, ±1/2, ±1/2, ±1/2, ±1/2, ±1/2, ±1/2, ±1/2, ±1/2, ±1/2, ±1/2).