Freese's Dissection of Four Equilateral Triangles into One

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.

This Demonstration shows Ernest Freese's dissection of four equilateral triangles to one equilateral triangle. The sides of the four smaller triangles are in the ratio 1:3:5:7. Carry out the five rotation and translation operations in any order.

Contributed by: Izidor Hafner (June 2016)
Open content licensed under CC BY-NC-SA



The photograph is taken from [1, p. 48].


[1] G. N. Frederickson, Piano-Hinged Dissections, Wellesley, MA: A. K. Peters, Ltd, 2006.

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.