Famous geometers and their contributions in geometry?
Archimedes - Euclidean geometry
Pierre Ossian Bonnet - differential geometry
Brahmagupta - Euclidean geometry, cyclic quadrilaterals
Raoul Bricard - descriptive geometry
Henri Brocard - Brocard points..
Giovanni Ceva - Euclidean geometry
Shiing-Shen Chern - differential geometry
René Descartes - invented the methodology analytic geometry
Joseph Diaz Gergonne - projective geometry; Gergonne point
Girard Desargues - projective geometry; Desargues' theorem
Eratosthenes - Euclidean geometry
Euclid - Elements, Euclidean geometry
Leonhard Euler - Euler's Law
Katyayana - Euclidean geometry
Nikolai Ivanovich Lobachevsky - non-Euclidean geometry
Omar Khayyam - algebraic geometry, conic sections
Blaise Pascal - projective geometry
Pappus of Alexandria - Euclidean geometry, projective
geometry
Pythagoras - Euclidean geometry
Bernhard Riemann - non-Euclidean geometry
Giovanni Gerolamo Saccheri - non-Euclidean geometry
Oswald Veblen - projective geometry, differential geometry