People often wonder whether artists really use geometry. I am convinced that they use geometry all the time—and that they use every kind of geometry. Sometimes artists have studied geometry; Salvador Dalí learned mathematics from Thomas Banchoff and René Thom. M.C. Escher used ideas from H.S.M. Coxeter and Roger Penrose; Leonardo da Vinci was himself […]

I taught geometry to two different audiences: Math majors with some inclination to proceed to secondary teaching or a graduate program in mathematics. Students taking mathematics to fulfill some general education requirements for a bachelor’s degree. In different ways, what I enjoyed in teaching both these groups was seeing the positive energy and enjoyment when […]