 \vec{ i } 

 \vec{ j } 

M \; = \; (x;y) \; ≅ \;  \vec{ OM } \; = \; x \vec{ i } \; + \; y \vec{ j }   

O = Intersect(xAxis, yAxis)
A_3 = Point(xAxis)
B = Point(yAxis)
u_1 = Vector(O, A_3)
v = Vector(O, B)
M = (4, 3)
u = Vector(O, M)
a = OrthogonalLine(M, yAxis)
b = OrthogonalLine(M, xAxis)
e = Line(O, A_3)
f = Line(O, B)
M_2 = Intersect(a, f)
M_1 = Intersect(b, e)
c = Segment(M_2, M)
d = Segment(M, M_1)