A = (-1.06, -1.42)
B = Point(Circle[A, 8])
f = Segment(A, B)
O = Midpoint(A, B)
c = Circle(O, B)
C = Point(c)
g = Segment(A, C)
h = Segment(C, B)
i = Segment(A, B)
α = Angle(A, C, B)