A Moebius strip
We can get a Moebius strip by taking a rectangle and pasting together two opposite sides after having imparted half a twist to one of the two. Here you can see the result.
See also the interactive animation From the rectangle to....
© matematita
immagine di Gian Marco Todesco
The image belongs to the sections...:
From "fragments of topology" (From "XlaTangente")
The Moebius strip (Topology)
Surfaces obtained from a rectangle (Topology)
Further information:
http://www.toonz.com/personal/todesco
