Wednesday, December 8, 2010

Mailing tape flexagons

Ulaanbaatar, Mongolia
Wednesday, December 8, 2010

This week it was time for one of my favorite math projects: hexa-hexa-flexagons. Constructed from paper mailing tape (remember when time was...), these wonderful math toys are easy to make and good for endless hours of fun. Finding the patterns is a great exercise in topology.

Until this year I thought there were only 15 patterns to be found, but this year three of my students found 18.

Photos: 1) flexagons in progress and 2) one student's work...