Very little is known about Euclid's early life except that he had a school in Alexandria, Egypt, where he taught mathematics. His fame stems from the set of 13 books on geometry that he compiled called "Elements," which set forth the principles of what is now known as Euclidian geometry. Euclid's work was so complete that "Elements" was used as a text for more than 2,000 years. Scholars believe that Euclid didn't actually discover geometry but clarified the work of earlier mathematicians and set it in a logical and concise order. Nonetheless, for his contribution to mathematics, Euclid has been called the "father of geometry."
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