local xB = 8
z.A = point:new(0, 0)
z.B = point:new(xB, 0)
L.AB = line:new(z.A, z.B)
S = L.AB:square()
_, _, z.C, z.D = get_points(S)
z.F = S.ac:projection(z.B)
L.BF = line:new(z.B, z.F)
T.ABC = triangle:new(z.A, z.B, z.C)
L.bi = T.ABC:bisector(2)
z.c = L.bi.pb
L.Cc = line:new(z.C, z.c)
z.I = intersection(L.Cc, L.BF)