69 points | by
35 days ago
Vi Hart is amazing with flexagons .
This is where I first learned about them! Absolutely loved watching her videos when I was younger and just getting into math/science as a concept.
And of course the best of all hexaflexagon videos: https://youtu.be/GTwrVAbV56o
Came here to post this
I made some tetra-tetra-flexagons for my wedding, and in the process made an ImageMagick script to take four images and turn them into two, one for each side of the sheet of paper.
https://www.timpark.org/making-a-tetratetraflexagon/ (unfortunately some of the external links are broken, I should do some editing)
related, the mexiflexagon: https://www.youtube.com/watch?v=GTwrVAbV56o
And more related, also from Vi Hart: https://www.youtube.com/watch?v=VIVIegSt81k, https://www.youtube.com/watch?v=paQ10POrZh8, https://www.youtube.com/watch?v=AmN0YyaTD60
The Hexaflexagon unit from "Things of Science" (June 1960):
I still have a 24-faced hexaflexagon I made in 1975, using onionskin paper and an HP plotter. (Thinness and accuracy are critical for high-order flexagons.)
Weird flex, but OK.
Is flexagon a made up word? Come on.
"Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something."
It's going to blow your mind when you realize all words are made up. Even more so when you find out that definitions change and new words are invented every year.
Though fees may apply, JFYI ;-):
It's an established mathematical term for these things. Of course, mathematical terms tend to be "made up" at some point, but I don't think that's a useful distinction.
Have you never read any Martin Gardner books ?
The wikipedia page  on the things is a good introduction too.