Moving legally in the plane
If you have the
Tcl Plugin
installed on your browser you can use the program right
here. Otherwise, you can download the Tcl/Tk source text by
right-clicking this
link
.
I used this program in my talk to the
New Mexico Math Contest
participants to illustrate the results in the paper "Lattice
polygons and the number 12", American Mathematical Monthly, March
2000, by B. Poonen and F. Rodriguez Villegas. You can check the
abstract.
I also mentioned a related puzzle
Blet
.