import sys class Point: def __init__(self, x=0.0, y=0.0): self.x = x self.y = y class Line: def __init__(self, point_a:Point, point_b:Point): self.point_A = point_a self.point_B = point_b class Coefficient: def __init__(self,A:float,B:float,C:float) -> None: self.A = A self.B = B self.C = C def c...