A = (-1.738049550146563, 5.479707963772249)
B = (2.9428012494956537, 8.39764092978298)
a = Segment(A, B)
C = (8.14036934520227, 5.145361478083519)
b = Segment(B, C)
c = Segment(C, A)
D = (0.9063272003006633, -3.061324988821675)
d = Segment(A, D)
e = Segment(D, C)
đa giác1, a_1, b_1, c_1, d_1 = Polygon(A, B, C, D)
chuvidagiacđa giác1 = Perimeter(đa giác1)