Z = (3, 4)
z = Vector((0.0, 0.0), Z)
c: x^(2.0) + y^(2.0) = Length[z]^(2.0)
b_1 = Line((0.0, 0.0), Z)
α = Angle(a_1, b_1)
d = OrthogonalLine(Z, a_1)
e = OrthogonalLine(Z, yAxis)
B = Intersect(e, yAxis)
C = Intersect(d, a_1)
f = Segment(Z, B)
g = Segment(Z, C)
h = Length(Vector[Vector[(0.0, 0.0), C]])
i = Length(Vector[Vector[(0.0, 0.0), B]])
a = Segment((0.0, 0.0), C)
b = Segment((0.0, 0.0), B)
Text1: "r = " + (Length[z]) + " E"
Text2: "a = " + (x(Z))
Text3: "b = " + (y(Z))