Geometry

Geometry (Greek Γεωμετρια, geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. It was one of the two fields of pre-modern mathematics, the other being the study of numbers. In modern times, geometric concepts have been generalized to a high level of abstraction and complexity, and have been subjected to the methods of calculus and abstract algebra, so that many modern branches of the field are barely recognizable as the descendants of early geometry. (See areas of mathematics and algebraic geometry.)

External links

• What Is Geometry?
• Geometria An online tool to compute lines, surfaces and volumes of the main plane and solid figures, through direct and indirect formulas.
• Geogebra A free dynamic geometry tool, useful for exploring geometry.
• Geometry Step by Step from the Land of the Incas by Antonio Gutierrez.
• Geometry. From Interactive Mathematics Miscellany and Puzzles
• Islamic Geometry
• Stanford Encyclopedia of Philosophy:
• Finitism in Geometry
• Geometry in the 19th Century
• Online Interactive Geometric Objects by Elmer G. Wiens