Curry Triangle Paradox

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

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.

Contributed by: Arne Eide (May 2012)
Open content licensed under CC BY-NC-SA



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

Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.