 \vec{ u } 

 \vec{ v } 

O = Intersect(xAxis, yAxis)
U = Point(xAxis)
V = Point(yAxis)
u = Vector(O, U)
v = Vector(O, V)
K = Point(xAxis)
c = Circle(O, K)
L = (2, 2)
a = Ray(O, L)
A = Intersect(c, a, 1)
i = (0, 1)
b = Segment(O, A)
M = Point(b)
M': (-2) / M