Complex sentence: The complete icosahedron can also be seen as a self-intersecting star polyhedron having 20 faces, where each face is an irregular 9/4 star enneagram, and with three faces meeting at each vertex.
Split into simpler sentences: The complete icosahedron can also be seen as a self-intersecting star polyhedron having 20 faces. Each face is an irregular 9/4 star enneagram, and three faces meet at each vertex.