Homothétie:\;Activité \;d'approche

k = -1.08 (slider from -2 to 2, step 0.01)
I = (6.12, 0.8)
A = (7.0804179918219, -1.54)
B = (2.0818181818181896, 3.46)
C = (3.1618181818181923, 0.44)
poly1, c, a, b = Polygon(A, B, C)
B' = Dilate(B, k, I)
C' = Dilate(C, k, I)
A' = Dilate(A, k, I)
poly1', c', a', b' = Polygon(A', B', C')