O = (8.236550129167178, -1.1363887317013166)
B_1 = (11.385378275310622, -4.31061065321688)
c = Circle(O, B_1)
A = Point(c)
B = Point(c)
a = Segment(A, B)
M = Midpoint(a)
b = Segment(O, M)
d = Segment(O, A)
e = Segment(A, M)
f = Segment(M, B)
g = Distance(b, d)