Browsing last breads to follow up what has been posted last days.
Dunno if it was shilling to distract from something or really curious anons.
I saw some mathematics and geometry, the most interesting thing I've ever learned was definitely the golden triangle.
It is the geometric base of star.
Look here:
https://en.wikipedia.org/wiki/Golden_triangle_(mathematics)
It includes the infamous Golden ratio/"PHI"
The small angle is 36° and the other two are both 72°.
Both angle's digits result in 9, which I always found interesting..
Also it represents the Fibonacci sequence (pic related)