User:Tomruen/Four-cube enneahedron

In geometry, a four-cube enneahedron is a non-orientable enneahedron. It has 9 faces, 24 edges, and 16 vertices. It has [3,3] symmetry order 24.

It has 6 crossed hexagons,, and 4 central squares.

It was constructed as a simple example of a non-orientable polyhedron. Its Euler_characteristic is one, and its genus is 1.