The document provides an overview of Euclid's geometry and contributions of various mathematicians to mathematics. It defines Euclidean geometry as the geometry commonly taught in secondary schools based on axioms and theorems developed by Euclid. It also distinguishes between axioms and postulates, lists all the axioms and postulates of Euclidean geometry, and briefly discusses the contributions of mathematicians like Euclid, Ramanujan, Descartes, Aryabhatta and Thales.

1. Euclid's Geometry

8. Euclid’s 1 to 4 Postulates

9. 5 th Postulate