somma

u + v

O = Intersect(xAxis, yAxis)
B = (1.22, 5.14)
A = (5, -1)
u = Vector(O, B)
v = Vector(O, A)
D: B + A
Somma = Vector(O, D)
a = Segment(B, A)
b = Segment(A, D)
c = Segment(D, B)