Explanation of the spherical volume with pyramids (3D with Geogebra4.25 in html5)

Click on picture to launch the ggb applet(be patient  a file long to open)

or

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

Bwt: You can open this link directly in Geogebra

 

A Geogebra applet in html5 with the 4.25 version

http://dmentrard.free.fr/GEOGEBRA/Maths/HTML/Html.html