Husky wrote: ↑Tue Apr 09, 2019 9:52 pm
@lphilpot
Thank you for the try - but that isn't accurate enough.
@Andrew
Seriously? That easy? My brain was boiling and I haven't seen the obvious thing to do. THANK you!
Mathematical the corract answer is:
R= r* ˙[1/sin( alpha) -1]
where alpha = 180/n