The Plastic Ratio - Numberphile

Ed Harriss discusses the plastic ratio - more amazing than the golden ratio? You decide!
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See our golden ratio videos: http://bit.ly/Golden_Ratio

Previous video with Ed (Heesch Numbers): Heesch Numbers and Tiling - Numberphile

Ed Harriss is online at http://maxwelldemon.com and on Twitter at Twitter: gelada

The Plastic Ratio Callipers were made by Eugene Sergeant: http://www.eugenesargent.com/

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