3 ms·

From Pentagons to Pentagrams

• yepyoukno 4mo ago
  Great article on stellated forms! I almost missed it due to the subtle unintuitive title!
• fbu 4mo ago
  The Great Dodecahedron is my favorite polyhedron, and it's possible to build one out of paper. Give it a try when you get a chance ! https://www.polyhedra.net/en/model.php?name-en=great-dodecahedron https://www.polyhedra.net/en/model.php?name-en=great-dodecah...
  • srean 4mo ago
    That makes atleast two of us. Where I live, they festoon a few of these on Christmas in addition to the more traditional five pointed star. I have always wondered whether it had easy enough net. The Icosahedron though, that makes my heart skip a beat sometimes.
• red_trumpet 4mo ago
  The fact that f(L^2) is positive can be seen without inspecting coordinates: after all it is the length of e_i', hence positive.
• andybak 4mo ago
  Related work-in-progress if you like polyhedra and tiling transformations: https://ixxyxr.github.io/polyhydra-web/ https://ixxyxr.github.io/polyhydra-web/ It has the Kepler-Poinsot polyhedra and allows you to apply a superset of Conway Operators to them. No true stellation currently (stellation isn't an edge-replacement operator so can't be mimicked by Conway-esque operations)