This is a preview. Log in through your library . Abstract In this paper we present a solution to the Fall 2011 PME Journal Problem Number 1245, prepared by Stan Rabinowitz. This problem asks whether ...

VO: Ambrose is an apprentice at the world famous Grecian Pizza Parlour. He's learning all aspects of the profession, and is now able to roll out a perfect circle of dough. This is how professional ...

Have you ever wondered why the cover of a manhole is nearly always round? Why isn’t it oval or square? Reuleaux curve based on an equilateral triangle. Reuleaux curves based on the pentagon (top) and ...