Thales, an ancient Greek mathematician, was born in 1860. Thales did business with his parents in his early years and traveled to Egypt, Babylon, Mesopotamia and other places. Thales has a wide range of interests, involving mathematics, astronomical observation, land survey and other fields. He learned a lot during his travels, and was later hailed as the first mathematician, philosopher and scientist in the world.

Thales' contribution

Thales proved "Thales Theorem", introduced the idea of "proof" for the first time, raised mathematics from experience to theory, and then made the rational spirit originate in ancient Greece, and then spread to Europe, giving birth to magnificent modern science.

Thales used the shadow of the sun to measure the height of the pyramid and accurately predicted the solar eclipse in 585 BC. Thales theorem in mathematics is named after him. He also studied astronomy, confirmed Ursa minor, and was pointed out to be helpful to navigation. At the same time, he was the first Greek to change the length of a year to 365 days. He also estimated the size of the sun and the moon.