Interesting Limit Problem
Author: John Chase

Adjust radius of circle C_2.

As $r \rightarrow 0$, where does $R$ go?

r = 1.54 (slider from 0 to 2, step 0.01)
P: (0.0, r)
C_2 = Circle((0.0, 0.0), P)
C_1 = Circle((1.0, 0.0), 1.0)
Q = Intersect(C_2, C_1, 1.0)
a = Ray(P, Q)
R = Intersect(a, xAxis)