Who is the Greek mathematician known for establishing a collection of geometrical theorems in his book "Elements"?

The Greek mathematician known for establishing a collection of geometrical theorems in his book "Elements" is Euclid. His work, written around 300 BCE, compiles and systematically presents the knowledge of geometry known at the time. "Elements" is one of the most influential works in the history of mathematics, forming the foundation for many geometrical principles that are still taught in schools today. The text systematically covers various topics, including plane geometry, number theory, and solid geometry, presenting theorems and proofs in a logical and axiomatic manner. Euclid’s approach set a standard for rigor in mathematical proofs and education, making his contributions fundamental to the development of mathematics and its teaching throughout history.