Euclid

                                                  



Euclid (sometimes called Euclid of Alexandria), was a Greek mathematician, often referred to as the "Father of Geometry". He was active in Alexandria during the reign of Ptolemy I (323 - 283 BC). His elements is one of the most influential works in the history of mathematics, serving as the main textbook for teaching mathematics especially geometry from the time of its publication until the late 19th or early 20th century. In the elements, Euclid deducted the principles of what is now called Euclidean Geometry from a small set of axioms. Euclid also wrote on  perspective, conic section, spherical geometry, number theory and rigor.

Contribution of Euclid in mathematics:

1. Euclidian geometry states that sum of the angles of a triangle is 180 degree.
2. Euclid formulated a method to find out the H.C.F.
3. He gave a proof that prime numbers are infinite.
4. It was Euclid who first proved root of 2 as a transcendental number.