a = 2.1 (slider from 0 to 10, step 0.1)
A = (-1.94, 1.66)
B = (7.34, 1.78)
b = Line(A, B)
V = Point(b)
V' = Point(b)
C = Midpoint(V, V')
c = Circle(C, a)
F, F' = Intersect(c, b)
d = Segment(V, V')
e = Circle(F, d)
Q = Point(e)
f = LineBisector(F', Q)
g = Line(F, Q)
P = Intersect(g, f)
lugar1 = Locus(P, Q)