x1,y1 = input().split(" ") x2,y2 = input().split(" ") x3,y3 = input().split(" ") x1,x2,x3,y1,y2,y3 = float(x1),float(x2),float(x3),float(y1),float(y2),float(y3) A1 = 2 * (x2 - x1) B1 = 2 * (y2 - y1) C1 = x2**2 + y2**2 - x1**2 - y1**2 A2 = 2 * (x3 - x2) B2 = 2 * (y3 - y2) C2 = x3**2 + y3**2 - x2**2 -...