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The Crazy Circle Illusion: How are these dots moving? GeoGeb

Author:Branka Milivojevic, Mathieu Blossier
Topic:Circle
Inspired by http://sploid.gizmodo.com/all-the-white-dots-in-this-rotating-circle-are-moving-i-1608517148. For more details watch https://www.youtube.com/watch?v=pNe6fsaCVtI GeoGebra week challenge

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