A = (15.213818430027585, 3.2553317804923365)
B = (10.57711442810645, -3.428427711638664)
C = (22.316854347864222, -3.428427711638664)
a = Line(A, B)
b = Line(B, C)
c = Line(C, A)
đa giác1, c_1, a_1, b_1 = Polygon(A, B, C)