The ancient Greek mathematician Euclid is often referred to as the father of geometry. Euclid lived in Alexandria around 300 B.C. and is the author of a treatise on mathematics and geometry known as "The Elements," widely acknowledged as one of the most important and influential books of all time.
"The Elements" is essentially a compendium of all of the mathematical knowledge available to Euclid and is notable for its systematic approach. It begins with a series of 10 axioms and extends these axioms by a series of mathematical proofs to 465 postulates or theorems, covering both plane and solid geometry as well as ratios and proportions. In his honor, plane and spatial geometry are often known as Euclidean geometry.