Tangente

Zentrale

Tangente

a = -10 (slider from -10 to 10, step 1)
A = (6.3, 2.44)
M = (3, 2)
C = Midpoint(M, A)
d = Circle(C, M)
k = Circle(M, 1.5)
D, E = Intersect(k, d)
α = Angle(D, A, M)
b = Line(D, A)
e = Line(A, M)
f = Line(A, E)
M' = Rotate(M, α / 5.0 * a, A)
γ = Angle(M', A, M)
g = Line(A, M')