Curry Triangle Paradox

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reassemble
solution
When reassembling the four pieces in the figure to another triangle, one square is left empty. How is this possible? This problem was invented by Paul Curry in 1953.

Details

In the solution, you can see a very narrow parallelogram of area 1.

External Links

Curry Triangle (Wolfram MathWorld)
Dissection Fallacy (Wolfram MathWorld)
Dissection Fallacy
Missing (or Extra) Square Optical Illusion
The Mystery of the Disappearing Square

Permanent Citation

Arne Eide
​
​"Curry Triangle Paradox"​
​http://demonstrations.wolfram.com/CurryTriangleParadox/​
​Wolfram Demonstrations Project​
​Published: May 9, 2012