Educational [illusion] Magnet-Like Slopes

shuukan

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4/29/15
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[illusion] Magnet-Like Slopes papercraft
Created by Japanese mathematical engineer Kokichi Sugihara, the magnetlike slopes illusion is cleverly designed to make marbles roll "uphill." It's a trick of perspective: The slopes actually tilt downward, but they are supported by leaning columns that look straight when viewed from a specific vantage point.


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