How to install tkz-2d in TeXLive 2010? My directory is /usr/local/texlive/2010 but i do not know which folder to place and even how to active.
tkz-2d package has been replaced by the
tkz-euclide package. You should download the latest version. When you unzip the folder you can move the contents to the the latex folder of your local texmf folder. See this answer for more details on how to set up your local folder, and where it is located.