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Folding Polygons into Pyramids 2

Folding Polygons into Pyramids 2

- Posted in Math by

Some corrections to a problem result in lengthy, ongoing discussions. On Brilliant.org, my original correction still raises the question "are we missing yet more 'smart' answers?" The Original
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Folding Polygons into Pyramids

Folding Polygons into Pyramids

- Posted in Math by

When I find incorrect answers in Brilliant.org, which is way more often than it should be for only one month of activity, I try to report the problem. Example: Which of the following regular polygons
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