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Cible atteinte! Bravo.

16 cm

A = (-5.47, 4.04)
r1 = 12 (slider from 1 to 16, step 1)
B = Point(Circle[A, r1])
A' = Rotate(A, -85°, B)
p = Ray(B, A')
B' = Rotate(B, 35°, A)
g = Ray(A, B')
D = Intersect(g, p)
c = Circle(D, 16)
C' = Rotate(D, 125°, B)
i = Ray(B, C')
f = Segment(A, B)
C_{1} = Midpoint(f)
Cible = Intersect(c, i)
Cible2: Cible
texte3: "" + r1 + " cm"
α = Angle(B, A, B')
k = Segment(B, Cible)
n = Segment(Cible, A)
δ = Angle(A', B, A)
ε = Angle(A, D, B)
γ = Angle(D, B, C')
j = Segment(D, Cible)
C = Midpoint(j)
h = Segment(A, D)
l = Segment(D, B)