 \vec{ a }+\vec{b} 

A_1 = (-3.7922, 0.5224)
B_1 = (-0.0654, 5.2414)
a = Vector(A_1, B_1)
C_1 = (-1.8078, 0.1594)
D = (2.524, -2.0186)
b = Vector(C_1, D)
A = (4.1696, 0.5466000000000016)
c = Line(A, a)
d = Circle(A, Segment[A_1, B_1])
B = Intersect(d, c, 2.0)
e = Line(B, b)
f = Circle(B, Segment[C_1, D])
C = Intersect(f, e, 2.0)
u = Vector(A, B)
v = Vector(B, C)
w = Vector(A, C)