1. The non-developable ruled surface named “milk carton”
(Day 2 of “Polyhedral Milk carton Week”)
Just learned something new! Someone has actually named a certain mathematically-defined hyperbolic surface: “milk carton.”
I found out about this on the French website, mathcurve.com, an online ENCYCLOPÉDIE DES FORMES MATHÉMATIQUES REMARQUABLES.
If you look up the definition of “berlingot” you find that it has two meanings. It can mean either a tetrahedral-shaped twisted hard candy, or a tetrahedral-shaped (Tetra-Pak) carton. And (in the real world) one of these definitions can sometimes contain the other.
2 more “milk cartons” after the fold…