GeoGebra is free and multi-platform dynamic mathematics software for learning and teaching geometry, algebra, statistics, and calculus. Download the free software at http://www.geogebra.org. Find the source code at http://www.geogebra.org/trac
Geometry Helper is simple program (no longer being developed) designed to help find the area and perimeter of a rectangle, triangle, or circle! A Turkish translation of the project is also included in the download file. NOTE: RELEASE TEMPORARILY BROKEN!
Translation program to learn other than native languages.
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