This nice applet is [url=http://tananyag.geomatech.hu/material/simple/id/508837]one[/url] of the [url=http://tananyag.geomatech.hu/]more than 2000 GeoGebra open educational resources[/url] created by the Hungarian [url=http://geomatech.hu/]Geomatech[/url] project.[br]In this activity you are about to find out the exact weight of a man, by learning how a teeter mathematically works. When you find a solution for the set of weights being put on the right, the Hungarian question asks you to type the weight exactly.[br]The Geomatech project was a joint work of the [url=http://www.metropolitan.hu/en/]Budapest Metropolitan University of Applied Sciences[/url] (formerly: BKF University) and the GeoGebra Team between 2013 and 2015, with [url=http://geomatech.hu/rolunk/munkatarsaink]a number of Hungarian experts in education and sciences involved[/url].