AREA OF THE SPHERE /AREA OF A CYLINDER ( 4 pi r²) (3D with Geogebra4.25)

 

Click on picture to launch the ggb applet

or

http://dmentrard.free.fr/GEOGEBRA/Maths/export4.25/Spheresurf.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