Tipo de Homotecia: 

Ampliación directa 

Disminución directa

Función Identidad

Disminución inversa o disminución indirecta

Ampliación inversa o ampliación indirecta

Razón de homotecia

A = (2.62, 1.6)
B = (3.78, 0.22)
C = (3.84, 0.98)
D = (2.56, 2.74)
c1, a, b, c, d = Polygon(A, B, C, D)
k = 3 (slider from -3 to 3, step 0.1)
E = (0.12, 1.28)
D' = Dilate(D, k, E)
C' = Dilate(C, k, E)
A' = Dilate(A, k, E)
B' = Dilate(B, k, E)
f = Line(E, D)
g = Line(E, A)
h = Line(E, C)
i = Line(E, B)
c2, b', a', d', c' = Polygon(B', A', D', C')