Euclid, an ancient Greek mathematician, is widely recognized as the father of geometry. He authored Elements, which is considered the most significant book on geometry. Euclid's approach to geometry was founded on a small set of truths known as axioms, which helped establish a method for solving problems called deduction. Euclid's book continued to be the primary textbook on geometry for over two millennia, and his work has had a profound impact on many different areas of mathematics. https://www.ancient-origins.net/human-origins-science/euclid-0020546