To manipulate the icosahedron above yourself, download the file 'icosahedron.cg3' and open it with the program 'Cabri 3D'. If you do not have Cabri 3D you can download a free trial here. Below, you can see a net of an icosahedron, manipulable yourself through the file icosanet.cg3 also created using Cabri 3D.

Dynamic Icosahedron

The above sketch was created by: Vladimir Dubrovsky (, Kolmogorov School of Moscow State University, 2003. Download the file icosahedron.gsp using The Geometer's Sketchpad. If you are a teacher and do not have The Geometer's Sketchpad you can download a free trial from here.

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