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Orbison's Illusion


	A fishbone pattern in a rectangular frame is superimposed by a rhombus. Adjust the rhombus until you think it has become a square, then check your selection by showing an accurate square. Even the rectangular frame seems to be distorted.


	Contributed by: Sándor Kabai

Orbison's Illusion (Wolfram MathWorld)

"Orbison's Illusion" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/OrbisonsIllusion/

Contributed by: Sándor Kabai

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