Double-click on the movie to PLAY.

Click once to PAUSE.

Double-click again to return to the START of the movie.

V1++

As the square rotates on and on, does the size of the overlap stay the same or change?

[You can download a larger version of the movie here.]




Where is the overlap a maximum/minimum? Where does it increase/decrease? We highlight some specific positions of the square on the next page.