9e ES18 Quel angle est-il ?

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A = (1.1400000000000001, 0.96)
c = Circle(A, 5.0)
a = Line(A, yAxis)
b = Line(A, xAxis)
B = Intersect(c, a, 2.0)
C = Intersect(c, b, 2.0)
D = Intersect(c, a, 1.0)
E = Intersect(c, b, 1.0)
C' = Rotate(C, 30.0*°, A)
C'' = Rotate(C', 30.0*°, A)
B'_1 = Rotate(B, 30.0*°, A)
B'' = Rotate(B'_1, 30.0*°, A)
E' = Rotate(E, 30.0*°, A)
E'' = Rotate(E', 30.0*°, A)
D' = Rotate(D, 30.0*°, A)
D'' = Rotate(D', 30.0*°, A)
min = 0 (slider from 0 to 60, step 1)
h = 3 (slider from 0 to 12, step 1)
F = Point(a)
B' = Rotate(B, -((min * 6.0)°), A)
u = Vector(A, B')
d: h * 30.0 + min * 0.5
F' = Rotate(F, -(d°), A)
v = Vector(A, F')
α = Angle(B', A, F')
β = Angle(F', A, B')