Japan had some pretty interesting traditions in the Edo period:<a href="https://en.wikipedia.org/wiki/Sangaku" rel="nofollow">https://en.wikipedia.org/wiki/Sangaku
zulux · · focus · HN ↗
Rendello · · focus · HN ↗
<a href="https://en.wikipedia.org/wiki/Sangaku" rel="nofollow">https://en.wikipedia.org/wiki/Sangaku