bridge
- Author:
- leonbloy
You can move origin points P (outside the big circle R2) and Q (inside small circle R1).
After that, you should drag point 'a' over the outer circumference so that the two angles are equal
http://math.stackexchange.com/questions/523315/where-to-build-a-bridge-to-cross-a-river-in-the-shape-of-an-annulus/
