Unizor  - Geometry2D - Elements - RulerCompass
Channel: Zor Shekhtman on UNIZOR Education
Date: 2011-09-02

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Geometry has developed as a branch of mathematics from practical needs of people. They wanted to build, to construct, to grow, to move. These activities required certain measurements, drawings, calculations etc. Historically, straight lines and circles were major building blocks of our civilization. That is why it is a well established standard in geometry to use an abstract straightedge ruler and abstract compass to construct geometrical figures.