His best-known work includes a proof of the Pythagorean theorem and a (*) fifth postulate that implies requirements for two lines to be parallel.
Bertrand Russell criticized this man's approach to mathematics in a work titled The Teaching of this man. One work by this man is preserved only partially and in Arabic; that work is his Divisions. A square, three-dimensional array of line segments is known as this man's orchard. His best-known work includes a proof of the Pythagorean theorem and a (*) fifth postulate that implies requirements for two lines to be parallel. For 10 points, name this Greek mathematician who wrote Elements and is considered the father of geometry.
Bertrand Russell criticized this man's approach to mathematics in a work titled The Teaching of this man.
{Euclid} of Alexandria