Euclid was a famous mathematician in ancient Greece. Euclid was born in Athens. At that time, Athens was culturally developed and was the cultural center of ancient Greece. It can be seen that Euclid was deeply influenced by culture at that time and was very interested in culture at a young age. After he came into contact with mathematics, he showed great enthusiasm for mathematics. At that time, there was a famous school called Plato Academy, which was built by Plato, a famous thinker, and many people came to study. At that time, there was a rule in Plato's Academy that "those who don't know geometry are not allowed to enter". This slogan stood at the school gate, and many people were blocked by it. At that time, many of them went to Plato's Academy to learn exquisite geometry, but they were directly rejected as soon as they arrived at the gate. When everyone was hesitant to go in, Euclid walked out of the crowd, opened the school door and went in.
Euclid invented Euclid algorithm, perfect number and other algorithms, which are all recorded in the Elements of Geometry. His Elements of Geometry is world-famous and used as a textbook by some universities in ancient Greece. Moreover, his Elements of Geometry laid the foundation of European mathematics and made great contributions to geometry. So far, the study of geometry should be based on the elements of geometry. So in modern times, some people think Euclid is a liar, but I don't think so.