Lindgren's Dissection of One Decagram {10/3} into Two Pentagrams {5/2}
Initializing live version

Requires a Wolfram Notebook System
Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.
This Demonstration shows Lindgren's dissection of one decagram {10/3} into two pentagrams {5/2}.
Contributed by: Izidor Hafner (March 2011)
Based on work by: Greg N. Frederickson
Open content licensed under CC BY-NC-SA
Snapshots
Details
The notation means join every
vertex of a regular
-gon.
G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge Univ. Press, 2002 p. 173.