A Twist-Hinged Dissection of Triangles
Requires a Wolfram Notebook System
Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.
This Demonstration shows a twist-hinged dissection of triangles showing that . The three main triangles pictured are equilateral. An equilateral triangle with side length has area , and the lengths of the sides of the three main triangles (check "show points" to see this) have side lengths 3, 4, and 5. The dissection shows that the sum of the areas of the two smaller triangles is equal to the area of the larger triangle. When you eliminate the factor from the equation, you obtain .
Contributed by: Izidor Hafner (September 2013)
Open content licensed under CC BY-NC-SA
Snapshots
Details
Reference
[1] G. N. Frederickson, Hinged Dissections: Swinging & Twisting, New York: Cambridge University Press, 2002 p. 240.
Permanent Citation
"A Twist-Hinged Dissection of Triangles"
http://demonstrations.wolfram.com/ATwistHingedDissectionOfTriangles/
Wolfram Demonstrations Project
Published: September 30 2013