xAB

yAB

xCD

yCD

xAB+xCD

yAB+yCD

A = (0, 0)
B = (1.5, 2)
AB = Distance(A, B)
u = Vector(A, B)
C = (1.5, 2)
D = (3.5, 2.5)
v = Vector(C, D)
B1: x(u)
B2: y(u)
B4: x(v)
B5: y(v)
B7: B1 + B4
B8: B2 + B5