1) Hodnotu λ volte pohybem posuvníku nebo
    vložením do vstupního pole. 
2) Pohybujte bodem A

λ

A = (7.42, 2.2)
S = (3.48, 2)
a = Line(A, S)
λ = -1.1 (slider from -5 to 5, step 0.1)
A' = Dilate(A, λ, S)
b = Segment(S, A)
c = Segment(S, A')
d = Distance(b, c)
e: c / b
text1: "\frac{|A'S|}{|AS|}=\frac{" + (LaTeX[c]) + "}{" + (LaTeX[b]) + "}=" + (LaTeX[e]) + ""
pole1 = Textfield(λ)