Formation analytical geometry and a principle additional

In article questions history of formation of analytical geometry are considered. This area of geometry is one of steps of transition from evklidovoi geometry to neevklidovoi. The basic methodological principles of the given theory are: the Principle of a continuity of Lejbnitsa and a principle additional the Pine forest. The analytical geometry was not absorbed neevklidovoi by geometry, and continues to develop and is one of bases of modern mathematics.