The problem of the sand trucks (Geogebra4.25 in html5)

Click on picture to launch the ggb applet

or

follow this link

http://dmentrard.free.fr/GEOGEBRA/Maths/export4.25/Camsable.html

Bwt: You can open this link directly in Geogebra

 

An applet from primary school with Geogebra 

http://dmentrard.free.fr/GEOGEBRA/Maths/Elementaire/Elementaire.htm