k = 1.8 (slider from -5 to 5, step 0.1)
O = (0.051751118671718194, 9.475598527022182)
hình1' = Dilate(hình1, k, O)
A = (2.7151413808402967, 9.38827425613141)
B = (7.256003467160496, 9.38827425613141)
a = Line(A, B)
C = (13.848985919413861, 23.09818478598278)
b = Line(O, C)