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The SAT Question Everyone Got Wrong (www.youtube.com)
submitted 9 months ago by simple@lemm.ee to c/videos@lemmy.world
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[-] Hugin@lemmy.world 5 points 9 months ago

The center travels 2π per rotation but need to travel 8π because the path of the center of the small circle is a circle 4r the radius of the large circle plus the radius of the small circle. It would be three if the center of the small circle traveled along the edge of the larger circle but it's edge to edge.

this post was submitted on 01 Dec 2023
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