Introduction to GeoGebra

GeoGebra is open source software. It is freely available at [a]www.geogebra.org.[/a] So, it can be used both in online and offline mode. Url https://[a]www.geogebra.org%2Fclassic[/a] can be used to run GeoGebra in online mode. GeoGebra classic 5 can be downloaded from www.geogebra.org and install it into PC to use it in offline mode.