An Icosahedron created with 20 Tetrahedrons and Gaps https://81018.com/wp-content/uploads/2017/05/pentastar.jpg?w=809 Icosahedron using tetrahedrons are either like the above with three primary pentagonal faces each with gaps of 7.35610317+ degrees OR with two pentagonal faces and a ten-tetrahedral ring as pictured below. ______ Share this:Tweet Share on Bluesky (Opens in new window) Bluesky Like this:Like Loading…