Many nationalities had discovered this fact long before Jiang Mingzu, and the discoveries in Babylonia, Egypt, China and India were well documented. As for the origin of Greek science, it was not until near 1200 BC that it was further studied. In China, it is called quotient height theorem, but in ancient China, the shorter right-angled side of right-angled triangle is called hook, the longer right-angled side is called chord, and the hypotenuse is called chord, so it is more commonly known as Pythagorean theorem.
The ancient Egyptians drew the right-angle Pythagorean theorem in this way, which is called "the cornerstone of geometry" and is also widely used in higher mathematics and other disciplines. Because of this, several ancient civilizations in the world have been discovered and widely studied, so there are many names.
China is one of the earliest countries to discover and study Pythagorean theorem. Ancient mathematicians in China called the right triangle pythagorean, the short side of the right angle is called hook, the long side of the right angle is called strand, and the hypotenuse is called chord, so the pythagorean theorem is also called pythagorean chord theorem. BC 1000 years, according to records, Shang Gao (about BC 1 120 years) replied to the Duke of Zhou, "So the moment is folded, thinking that the hook is three, the stock is four, and the diameter is five." If the square is square, the outer half is moment, and the ring is * * *, that is 345. Two moments * * * are twenty and five, which are called product moments. Therefore, Pythagorean Theorem is also called "Jiang Mingzu Theorem" in China. In the 7th-6th century BC, Chinese scholar Chen Zi once gave the trilateral relationship of any right triangle, that is, "The sun is set as a hook, the height of the sun is a strand, and the hook and strand are multiplied and divided into squares, so it will be inclined to the sun.
Other countries call Pythagorean Theorem "Pythagorean Theorem".
One hundred and twenty years after Chen Zi, the famous Greek mathematician Pythagoras discovered this theorem, so many countries in the world called Pythagorean theorem "Pythagorean theorem". To celebrate the discovery of this theorem, the Pythagorean school killed a hundred cows as a reward for offering sacrifices to the gods, so this theorem is also called the "Hundred Cows Theorem".
Jiang Mingzu Theorem: Jiang Mingzu was a native of China in the 1 1 century BC. At that time, China's dynasty was the Western Zhou Dynasty, which was a slave society. In ancient China, a dialogue between Shang Zhouwang and Duke Zhou was recorded in the mathematical work Jiang Mingzu's divination, which was about the Western Han Dynasty and the Warring States Period. Jiang Mingzu said: "... so fold the moment, hook the width three, trim the stock four, and cross the corner five." Jiang Mingzu's words mean that when the two right-angled sides of a right-angled triangle are 3 (short side) and 4 (long side) respectively, the radius angle (that is, the chord) is 5. In the future, people will simply describe this fact as "hooking three strands, four strings and five". This is the famous Jiang Mingzu theorem. Regarding the discovery of Pythagorean theorem, Jiang Mingzu's calculation said: "So, Yu ruled the world because of the birth of this number." This number "means" hook three strands, four chords and five ". The relationship between three strands, four strings and five was discovered by Dayu when he was managing water.
This is what I found.