Ha -- and in my spare moments today I counted 87 (by hand). So, can we split the difference and agree on 86 ? --Dan Allan wrote: << As luck would have it, this afternoon I had a boring staff meeting in which I enumerated all of them ... I think. And the answer is 85 ... I think. On Tue, Dec 6, 2011 at 12:36 PM, Richard Guy <rkg@cpsc.ucalgary.ca> wrote:
This seems to be a particular case of the necklace problem which was solved by Hazel Perfect in Math Gaz, when? (more than half a century ago -- not in MR) R.
On Tue, 6 Dec 2011, Dan Asimov wrote:
What are all the ways that 30-, 60-, and 90-degree angles can be arranged
about the origin in the plane?
________________________________________________________________________________________ It goes without saying that .