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Wikipedias leiab teema Coin Rotation Paradox'i alt

a = 2 (slider from 1 to 5, step 0.1)
phi = 0 (slider from 0° to 180°, step 1°)
d: (cos(phi), sin(phi))
r_s: a
I: (d * r_s)
A = Intersect(xAxis, yAxis)
u: x = (((2 * a) * (1 - cos(phi))) * cos(phi)) + r_s
v: y = (((2 * a) * (1 - cos(phi))) * sin(phi))
L = Intersect(v, u)
lookus1 = Locus(L, phi)
O: I + (a * d)
m = Circle(O, a)
s = Circle(A, r_s)
J = Rotate(L, π / 4, O)
K = Rotate(L, ((-π)) / 4, O)
muster = Rotate(Polygon[K, J, 4], π / 4, O)
vis = false