anima C

A = Intersect(zAxis, xOyPlane)
B = Point(zAxis)
a = Ray(A, B)
b = Segment(A, B)
C = Point(b)
D = (-2.0306840231899024, -0.09364303522777107, 0)
E = (-0.17347768286211362, 3.77935437119136, 0)
F = (2.8712277373513686, -0.005243636912524607, 0.0011544470946440732)
G = (2.3453911423181246, -4.633216480471982, -3.552713678800501E-15)
poli1, e, d, g, f = Polygon(E, D, G, F)
c, facciaCDE, facciaCDG, facciaCFG, facciaCEF, spigoloCE, spigoloCD, spigoloCG, spigoloCF = Pyramid(poli1, C)
h = Ray(C, F)
i = Ray(C, E)
j = Ray(C, G)
k = Ray(C, D)
α = Angle(D, C, G)
β = Angle(E, C, D)
γ = Angle(E, C, F)
δ = Angle(F, C, G)
s: α + β + γ + δ
testo2: "Somma degli angoli di vertice C
                  " + s + ""