geometria piana
trasformazioni geometriche
https://picasaweb.google.com/marinofurlan2/Area_simmetria?authuser=0&feat=directlink
simmetria assiale
qassiale3a.gif
assiale
https://picasaweb.google.com/lh/photo/AnSGWykvZdlmdRbkIeAJU9MTjNZETYmyPJy0liipFm0?feat=directlink