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|"A flexagon is a polygon folded from paper with a very remarkable quality: you can turn it inside out to make it reveal hidden surfaces." History, including the original discovery of the tri-hexaflexagon by Arthur H. Stone, as he folded strips of paper left over from cutting American papers to make them fit into an English file; and illustrations of how to make a hexa-hexa-flexagon and how to flex the flexagon.|
|Levels:||Middle School (6-8), High School (9-12), College, Research|
|Resource Types:||Manipulatives, Recreations|
|Math Topics:||Triangles and Other Polygons, Topology|
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