What is Euclid known for?

Euclid, the Greek mathematician, also known as the Father of Geometry and Euclid of Alexandria, is best known for his 13 volumes of mathematics texts called Elements. He taught at the university in Alexandria, Egypt, and while there he published many theories developed by other mathematicians, along with their proofs, in Elements. Euclidean geometry from more than 2,000 years ago forms the basis of the geometry still taught in schools today.