What are 4 mathematicians contribute in geometry?

Answer 1

Four great mathematicians who contributed to geometry are Pythagoras, Euclid, Rene Descartes and Bernhard Riemann. Pythagoras contributed the Pythagorean theorem. Euclid's geometrical works helped develop geometry in many ways. Descartes contributed Cartesian Geometry. Riemann's contribution can be seen in the form of Riemannian Geometry.