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Hypocykloida - rp/rh racionální
Tažením myši změňte velikost parametrů:
[math]u/v[/math] - poloměr kružnice pevné / poloměr kružnice hybné
[math]d/b[/math] - poměr vzdálenosti bodu [math]X[/math] od středu hybné kužnice / poloměr kružnice hybné