Triangular-square duotegmatic octacontateron

The triangular-square duotegmatic octacontateron, also called the joined demipenteract, is a convex isoteric polyteron with 80 identical triangular-square duotegums as tera. It can be obtained as the dual of the uniform penteractitriacontaditeron.

It can also be obtained as the convex hull of a penteract and a triacontaditeron, where the edges of the triacontaditeron are $$\frac{3\sqrt2}{2} ≈ 2.12132$$ times the length of those of the penteract.