$ sudo apt-get remove geogebra 

Uninstall geogebra including dependent package

If you would like to remove geogebra and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove geogebra 

Use Purging geogebra

If you use with purge options to geogebra package all the configuration and dependent packages will be removed.

$ sudo apt-get purge geogebra 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove geogebra 

See Also,