Mental Stretch

[bagwa-john]

Yes. I just woke up with that answer going through my head. The inner circle and the outer circle will ALWAYS have a 20 foot chord relationship at infinity both diections. DOH!
Nice puzzle. It teaches alot.
I discovered a three dimensional series which starts with a Dodecahedron and expands toward infinity outward toward but never actually becoming the Icosadodecahedron, because of the distace defined by the distance defined by the opposite faces of the dodecahedron.
I should have seen that in the puzzle.