If someone can help me figure out the measurements here, I will happily rep them +28 every time I see them post and I can rep.

http://mathcentral.uregina.ca/QQ/dat....06/phil1.html

My measurements known are (labelled according to the diagram in the link):

* t = 2.5" diameter
* b = 4" diameter
* w = 14"

I've worked it out, but I'm 90% sure I'm messing up somewhere.

I've gotten:
r = 7.799
R = 12.559
Inner circle = 57 degrees

Just doesn't make sense considering those numbers are pretty much the same as the circumferences.