Regular Polyhedra
Polyhedra
 

Dodecahedron-Icosahedron Compound. The dual of the dodecahedron is  the icosahedron.
 

Check the relation between the dodecahedron and the icosahedron.
The edges of the dodecahedron and a concentric icosahedron appear.

Click on the down triangles to change the size of a icosahedron. When it reaches a certain value, a number appears in the window.

Notice the vertices, the centres of the faces and the edges of the dodecahedron and the icosahedron.

- What singularity occurs when the number 1 appears?

- What singularity occurs when the number 2 appears?

- What singularity occurs when the number 3 appears?

Notice the plane of a face and the one passing by  several edges.

- What singularity occurs when the number 4 appears?

- What singularity occurs when the number 5 appears?
       
           
  Eduardo Barbero Corral
 
Spanish Ministry of Education , Social Afairs and Sport. Year 2007
 
 

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