Non-Euclidean geometry that are both perpendicular to a third line: Euclidean geometry, named after the Greek mathematician Euclid, includes some of the oldest known mathematics, and geometries that deviated from this were not widely accepted as legitimate until the 19th century. The debate that eventually led to the discovery of the non-Euclidean geometries began almost as soon as Euclid's work "Elements" was written. In the "Elements", Euclid began with a limited number of assumptions (23 definitions, five common notions, and five postulates) and sought to prove all the other results (propositions) in the work. The most notorious of the postulates is often
Buddhism in the West that he adopted the Buddhist religion. The Buddhist tradition considers Menander as a great benefactor of the Dharma, along with Ashoka. The "Mahavamsa" mentions that during Menander's reign, a Greek elder monk named Mahadharmaraksita led 30,000 Buddhist monks from "the Greek city of Alexandria" (possibly Alexandria on the Caucasus) to Sri Lanka for the dedication of a stupa showing that Greeks took an active part in Indian Buddhism during this period. Greco-Buddhist styles continued to be influential during the Kushan empire. Buddhist gravestones from the Ptolemaic period have also been found in Alexandria in Egypt decorated with depictions of the