16-cell (cell-first)
16-cell
This is the cell-first (tetrahedron-first) orthographic projection of the 16-cell into 3-space. It is one of the six convex regular polychora (4-dimensional version of the Platonic solids). It contains 16 tetrahedral cells, 32 equilateral triangles, 24 edges, and 8 vertices with an octahedral vertex figure.