A = (7, -5)
B = (7, 2)
b = 0 (slider from 0 to 720, step 1)
angm: 6.0 * b
C = Rotate(B, (-(angm))°, A)
α = Angle(C, A, B)
a = Segment(A, C)
D = (7, -1)
c = Segment(A, D)
angh: 0.5 * b
E = Rotate(D, (-(angh))°, A)
β = Angle(E, A, D)
e = Segment(E, A)
F = (7, 4.2)
f = Circle(A, F)