u_{1}=w_{1}

Proy_{S1} u_{2}

-proy_{S1} u_{2}

Proy_{S2} u_{3}

- Proy_{S2}u_3

U1 = Point({1, -1, 0})
W3 = Point({(-(2 / 11)), (-(2 / 11)), (-(6 / 11))})
w_{3} = Vector(W3)
V1 = Point({1 / sqrt(2), (-(1 / sqrt(2))), 0})
v_{1} = Vector(V1)
U2 = Point({1, 2, -1})
U3 = Point({0, 1, -1})
u_{1} = Vector(U1)
u_{2} = Vector(U2)
u_{3} = Vector(U3)
O = Point({0, 0, 0})
S_{1} = Line(O, v_{1})
W2 = Point({3 / 2, 3 / 2, -1})
w_{2} = Vector(W2)
U2P = Point({(-(1 / 2)), 1 / 2, 0})
u2p = Vector(U2P)
U2U2P = Segment(U2P, U2)
MU2P = Point({1 / 2, (-(1 / 2)), 0})
mu2p = Vector(MU2P)
MU2PW2 = Segment(MU2P, W2)
U2W2 = Segment(U2, W2)
α = Angle(w_{3}, v_{1})
V2 = Point({3 / sqrt(22), 3 / sqrt(22), -2 / sqrt(22)})
v_{2} = Vector(V2)
n: v_{1} ⊗ v_{2}
S_{2} = OrthogonalPlane(O, n)
U3P = Point({2 / 11, 13 / 11, (-(5 / 11))})
u3p = Vector(U3P)
U3U3P = Segment(U3, U3P)
MU3P = Point({(-(2 / 11)), (-(13 / 11)), 5 / 11})
mu3p = Vector(MU3P)
MU3PW3 = Segment(MU3P, W3)
U3W3 = Segment(U3, W3)
β = Angle(w_{3}, v_{1})
γ = Angle(w_{3}, v_{2})
V3 = Point({-1 / sqrt(11), (-(1 / sqrt(11))), (-(3 / sqrt(11)))})
v3 = Vector(V3)