
Re: Reuleaux triangle
Posted:
Apr 17, 1995 7:39 AM


>Can this triangular drill bit be modelled in Sketchpad or Cabri? Anyone >here tackled it? Or should I get the book and give it a try?
Well, I spent this cold & snowy(!) Saturday trying to model it. The chapter by Rademacher and Toeplitz in "The Enjoyment of Math" gives only minimal information, mostly on the construction of curves of constant breadth and properties thereof. The construction of the bit itself is trivial, it is the rotation of the bit that is the problem  in order for it to rotate inside a square, the centre of rotation itself must move, and not in any standard (i.e. easy to animate) orbit. If you've made or found a sketch please let me know! I'll keep struggling...
Calvin Armstrong Stanstead College Quebec, Canada

