Freese's Dissection of a Regular Octagon into Nine

Requires a Wolfram Notebook System
Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.
This Demonstration shows Freese's dissection of a regular octagon into nine congruent regular octagons.
Contributed by: Izidor Hafner (May 2018)
Open content licensed under CC BY-NC-SA
Snapshots
Details
The photo is from [1, plate 97].
Reference
[1] G. N. Frederickson, Ernest Irving Freese's Geometric Transformations: The Man, the Manuscript, the Magnificent Dissections!, New Jersey: World Scientific, 2018.
Permanent Citation
"Freese's Dissection of a Regular Octagon into Nine"
http://demonstrations.wolfram.com/FreesesDissectionOfARegularOctagonIntoNine/
Wolfram Demonstrations Project
Published: May 3 2018