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Bellhop

10/9/2012 4:02 PM EDT

Very clever, Brian! You spread it out over ten pages so that you could get ten ...

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kjdsfkjdshfkdshfvc

10/9/2012 1:37 PM EDT

I know I'm getting old, but when I learned drafting, that pointy thing was ...

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# Using HexaFlexagons to pass secret messages

## 10/2/2012 6:36 PM EDT

Marking an edge

Now, you can make these any size you want, but I am going to assume that you will want to make one of these from a regular sheet of paper. You need to easily divide a strip into 6 equal pieces, so something like 4 cm or 1 1/2 inches would be good lengths. I will make mine 1 ½ inches, so trim the paper to 9 inches. Along one edge, mark off six equal distances.

Geoff_J

10/4/2012 12:59 PM EDT

Or you could watch this :

This video is based on, and in honor of, Martin Gardner's first Mathematical Games column from 1956, "Hexaflexagons," which can be found here: http://maa.org/pubs/focus/Gardner_Hexaflexagons12_1956.pdf

ccalvin

10/8/2012 3:04 PM EDT

I remember reading about Flexigons in SciAm while in Jr. High School. And colored the faces, concealed messages, etc. The mma.org link is interesting as Bryant Tuckerman, Richard Feynman, and John Tukey are mentioned on page 3 as some who worked with flexigons.

alaki

10/5/2012 12:56 PM EDT

Seems someone running out of ideas! :)

BrianBailey

10/9/2012 12:55 PM EDT

We all need distractions from our working life at times and some of these things from our past are fun.

kjdsfkjdshfkdshfvc

10/9/2012 1:37 PM EDT

I know I'm getting old, but when I learned drafting, that pointy thing was called a compass, not a protractor.

Bellhop

10/9/2012 4:02 PM EDT

Very clever, Brian! You spread it out over ten pages so that you could get ten page-view clicks from each reader!