The inventor of geometry was Euclid, and his nickname was The Father of Geometry. Euclid obtained his education at Plato's Academy in Athens, Greece and then moved to Alexandria.
Euclid is the author of "The Elements." This series of 13 books covers number theory, irrational numbers, plane geometry and solid geometry. The series once sold more copies than any other book, other than the Bible. Euclid proved that a person can draw a straight line between any two points and that all right angles are equal, among other theories. He also organized geometric ideas. Euclid wrote other works as well, including "Phaenomena" and "Data."