Hai đường thẳng AB và BC trùng nhau

A_1 = (16.153200000000005, -3.3968000000000007)
B_1 = (21.041600000000006, -3.3968000000000007)
a = Line(A_1, B_1)
C_1 = Point(a)
D = Point(a)
b = Segment(C_1, D)
A = (14.217200000000004, -3.5662000000000007)
F = (17.653600000000004, -3.5420000000000007)
c = Line(A, F)
B = (17.630995176848877, -3.5309893890675244)
d = Line(B, c)
C = Point(d)