From Pentagons to Pentagrams(johncarlosbaez.wordpress.com)
johncarlosbaez.wordpress.com
From Pentagons to Pentagrams
https://johncarlosbaez.wordpress.com/2026/05/29/from-pentagons-to-pentagrams/
5 comments
Great article on stellated forms! I almost missed it due to the subtle unintuitive title!
Related work-in-progress if you like polyhedra and tiling transformations: 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)
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)
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.
https://www.polyhedra.net/en/model.php?name-en=great-dodecah...