China
Gougu Theorem (10 juill. 1046 av. J.-C. – 10 juill. 771 av. J.-C.)
Description:
 (3, 4, 5) triangle  from Zhoubi Suanjing book in Zhou Dinasty 500-200 BC
During the Han Dynasty (202 BC to 220 AD), Pythagorean triples and right appear in The Nine Chapters on the Mathematical Art book. 
Ajouté au bande de temps:
Date:
10 juill. 1046 av. J.-C.
10 juill. 771 av. J.-C.
 ~ 275 years