This program can be used to familiarize oneself with the different shapes, their relations, and their proportions. By rotating them, one can also get a good feel for their symmetry. But the real purpose behind the program is to use it as a tool to learn and practice fractions.

NOTE: Jill Britton discovered that a zipped version of this applet by Jacobo Bulaevsky had been stored on-line in 2006. She was able to download it using web archive, reconstruct it, and now provides access through her College's server.