Equilateral Triangle to Square

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.

How to cut an equilateral triangle so that the pieces can be reassembled to form a square is the most famous of the geometrical discoveries made by Henry Dudeney, England's greatest inventor of puzzles, who lived in the 1900s. This Demonstration shows that the four pieces can be linked with hinges and closed back and forth to pass from triangle to square and vice versa.

Contributed by: Jaime Rangel-Mondragon (March 2011)
Open content licensed under CC BY-NC-SA




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.