http://www.youtube.com/watch?v=HZMZu_eYrQM&feature=related  poliedros

http://www.youtube.com/watch?v=0cveGfnwEZQ&feature=related  repaso de figuras

http://www.youtube.com/watch?v=0cveGfnwEZQ&feature=related  ver girar 

http://www.youtube.com/watch?v=XaEDe61qy7g&feature=fvsr  pentagono