cm

F = (0, 7)
B = (0, 2)
a = Segment(F, B)
C = (5, 2)
b = Segment(B, C)
D = (5, 7)
c = Segment(C, D)
d = Segment(D, F)
J = (0.5159722222222174, 2.695138888888886)
K = (4.453472222222219, 4.945138888888887)
L = Midpoint(J, K)
e = Segment(J, K)
u = Vector(J, K)
v = Vector(K, J)