M_1 = (0, 0)
r_1 = 2 (slider from -5 to 5, step 0.1)
r_2 = 0.5 (slider from -5 to 5, step 0.1)
c_3 = Circle(M_1, r_1 - r_2)
M_2 = (4, 0)
c_1 = Circle(M_1, r_1)
Q_1 = Point(c_3)
d = Ray(M_1, Q_1)
a = Segment(Q_1, M_2)
c_2 = Circle(M_2, r_2)
b = LineBisector(Q_1, M_2)
P = Intersect(d, b)
A = Intersect(c_1, d)
c = Segment(P, M_2)
B = Intersect(c_2, c)
e = Segment(A, P)
f = Segment(P, B)