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| Zhoubi Suanjing | |||||||||
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 The Gougu Theorem diagram added to the Zhoubi by Zhao Shuang | |||||||||
| Zhoubi Suanjing | |||||||||
| Traditional Chinese | 周髀算經 | ||||||||
| Simplified Chinese | 周髀算经 | ||||||||
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| Zhoubi | |||||||||
| Chinese | 周髀 | ||||||||
| Literal meaning |
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| Suanjing | |||||||||
| Traditional Chinese | 算經 | ||||||||
| Simplified Chinese | 算经 | ||||||||
| Literal meaning |
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The Zhoubi Suanjing, also known by many other names, is an ancient Chinese astronomical and mathematical work. The Zhoubi is most famous for its presentation of Chinese cosmology and a form of the Pythagorean theorem. It claims to present 246 problems worked out by the Duke of Zhou as well as members of his court, placing its composition during the 11th century BC. However, the present form of the book does not seem to be earlier than the Eastern Han (25–220 AD), with some additions and commentaries continuing to be added for several more centuries.
The book was included as part of the Ten Computational Canons.