Sangaku goes Fibonacci
This is to show the investigation to find a simple construction for an old Sangaku figure.
The vertices of the squares happen to slide on straight lines connecting two Fibonacci rectangles with 1, 1, 2, 3 squares.
Original Sangaku mysterious figure.
![Original Sangaku mysterious figure.](https://www.geogebra.org/resource/sKV598Hm/czB1KGnYjt0ouXAd/material-sKV598Hm.png)