A = (-1.92, 0.98)
B = Point(Circle[A, 6.4])
a = Segment(A, B)
C = Midpoint(a)
D = Midpoint(A, C)
E = Midpoint(C, B)
c = Semicircle(A, C)
d = Semicircle(B, C)
e = Circle(C, B)