勾股定理英文Pythagoras' Theorem，怎么成毕达哥拉斯定理了？

摘要：Pythagorean theorem, the well-known geometric theorem that the sum of the squares on the legs of a right triangle is equal to the

国外为什么喜欢用科学家的名字来命名定理？比如牛顿定理、欧几里得定理、欧拉定理，还有毕达哥拉斯定理。

第一次听到毕达哥拉斯定理真的是一头雾水，我明明TOP10 985高校别业，但为什么从没听过毕达哥拉斯定理？

1 英文原意

勾股定理 Pythagoras' Theorem

2 英文解释

In a right angled triangle: the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Pythagorean theorem, the well-known geometric theorem that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse (the side opposite the right angle)—or, in familiar algebraic notation, a2 + b2 = c2. Although the theorem has long been associated with Greek mathematician-philosopher Pythagoras (c. 570–500/490 BCE), it is actually far older. Four Babylonian tablets from circa 1900–1600 BCE indicate some knowledge of the theorem, with a very accurate calculation of the square root of 2 (the length of the hypotenuse of a right triangle with the length of both legs equal to 1) and lists of special integers known as Pythagorean triples that satisfy it (e.g., 3, 4, and 5; 32 + 42 = 52, 9 + 16 = 25). The theorem is mentioned in the Baudhayana Sulba-sutra of India, which was written between 800 and 400 BCE. Nevertheless, the theorem came to be credited to Pythagoras. It is also proposition number 47 from Book I of Euclid’s Elements.

勾股定理，一个著名的几何定理，即直角三角形两直角边的平方和等于斜边（与直角相对的一侧）上的平方，或者用熟悉的代数符号来说，a2 + b2 = c2。尽管该定理长期以来一直与希腊数学家兼哲学家毕达哥拉斯（约公元前 570-500/490 年）联系在一起，但实际上它要古老得多。大约公元前 1900 年至公元前 1600 年的四块巴比伦泥板表明了对该定理的一些了解，其中非常准确地计算了 2 的平方根（短边长度为1直角三角形的斜边长度为✓2）和满足它的特殊整数列表（称为毕达哥拉斯三元组）（例如 3、4 和 5；32 + 42 = 52，9 + 16 = 25）。该定理在公元前 800 年至公元前 400 年间写成的印度 Baudhayana Sulba-sutra 中被提及。尽管如此，该定理还是被归功于毕达哥拉斯。它也是欧几里得《元素》第一卷中的第 47 号命题。

3 中文解释

勾股定理，是一个基本的几何定理，指直角三角形的两条直角边的平方和等于斜边的平方。中国古代称直角三角形为勾股形，并且直角边中较小者为勾，另一长直角边为股，斜边为弦，所以称这个定理为勾股定理，也有人称商高定理。