Enneagram Astrology Math connections

[meals]

Sorry- the title of this thread should just be Enneagram Math connections. I have a separate thread for Enneagram Astrology.

This point in this video on sacred geometry:

https://youtu.be/OcDcGsbYA8k?t=406

shows how the enneagram circle with the 9 points makes sense mathematically and shows why 3-6-9 are separated out from the rest of the numbers.

This amazed me. Not sure how to promote this so other people will see it ...