Скачать или смотреть Sliceform torus

This torus has been made as a Sliceform.

It is a paper model made from two sets of slices of the torus.
It folds flat because the intersection of each set of slices acts as a hinge.
The slices are cut so that one set includes the Villarceau circles.
For more on Sliceforms do a web search with Google.
See www.tarquinbooks.com for books of models to cut out and ways to explore the mathematics of surfaces using Sliceforms.

For a tutorial on how to make this Sliceform (and more background), using Sketchup, see http://sliceforms.wordpress.com/
There is a torus provided and full details on how to print out the slices.