P_{0}(x_{0},y_{0},z_{0})

P(x,y,z)

OP

u = Vector((2, 1, 0))
v = Vector((-2, 2, 0))
P_{0} = Point({-2, 0, 3})
OP_{0} = Vector(P_{0})
W = Point({0, 0, 2})
n = Vector(W)
V = Point({-4, 2, 3})
X = OrthogonalPlane(P_{0}, n)
w = Vector(P_{0}, V)
U = Point({0, 1, 3})
a = Vector(P_{0}, U)
p: w + a
P = Point({-2, 3, 3})
P_{0}P = Vector(P_{0}, P)
f = Segment(U, P)
g = Segment(V, P)
b = Vector(P)