Angle between Two Vectors

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b = Random(-3, 3)
f = Random(0, -4)
e = Random(-4, 10)
d = Random(0, 6)
c = Random(-6, 10)
a = Random(-3, 3)
A: (a, b)
B: (c, d)
u = Vector(A, B)
C: (e, f)
v = Vector(A, C)
α = Angle(u, v)
text2: "Angle = " + (LaTeX[α]) + ""
j: false