Lecture 12: Flexible polyhedra, Bellows Theorem; folding polygons into polyhedra, gluings, convex polyhedral metrics, Aleksandrov's Theorem, Sabitov's algorithm, ungluable polygons
Page 5: An ungluable polygon; random polygons are ungluable
You can view the Demaine, Demaine, Lubiw, O'Rourke paper about foldings of polygons into convex polyhedra.
These are rough, personal lecture notes handwritten by Erik Demaine used during lecture. Their primary purpose is for reading/review by students of the class.