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Source: Chinese Pythagorean theorem, from page 22 of Joseph Needham's Science and Civilization in China: Volume 3, Mathematics and the Sciences of the Heavens and the Earth, published in 1986 by Cave Books Ltd., based in Taipei (with permission from Cambridge University Press). isbn:0521058015


Visual proof for the (3, 4, 5) triangle as in the Chou Pei Suan Ching 500–200 BC.
Left sentence: 勾股幂合以成弦幂 (gōu gǔ mì hé yǐ chéng xián mì)


Translation: The sum of the squares of lengths of altitude and base is the hypotenuse's length squared.
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Other versions File:Chinese_pythagoras.jpg


This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Tinted for emphasis. The original can be viewed here: Chinese pythagoras.jpg: . Modifications made by Brews ohare.


Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
 Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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  • File:Chinese_pythagoras.jpg licensed with PD-old
    • 2005-04-11T03:20:50Z Avsa 871x475 (71149 Bytes) {{PD}} Chinese pythagorean theorem. Need to identify source (year)

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current21:04, 24 May 2010Thumbnail for version as of 21:04, 24 May 2010928 × 531 (334 KB)Brews oharetransparent triangle
20:42, 24 May 2010Thumbnail for version as of 20:42, 24 May 2010928 × 531 (323 KB)Brews ohare{{Information |Description={{PD-old}} Source: Chinese Pythagorean theorem, from page 22 of Joseph Needham's ''Science and Civilization in China: Volume 3, Mathematics and the Sciences of the Heavens and the Earth'', published in 1986 by Cave Books Ltd., b
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