Persian spiral by Anita Chowdry
A beautiful persian illumination, designed by the prolific Anita Chowdry, boasting a splendid spiral. Let's investigate it. It is indeed a logarithmic spiral. Is it a golden spiral?
You can move the golden point parametrizing the golden spiral.
You can as well move the points and see the associated and the linear regression. This now leads to the blue spiral that fits this data.