Regular Polyhedra  
Polyhedra  
Regular Polyhedra.  
Regular
polyhedra satisfy these conditions: There
are only five regular polyhedra: 
The tetrahedron.  

The most simple regular polyhedron is the tetrahedron.
 What types of polygons are its faces?  How many
faces converge in each vertex?  Are all its
faces equal? How many
faces does this polyhedron have? How many
edges does it have? How many
vertices does it have? 
Eduardo Barbero Corral  
Spanish Ministry of Education , Social Afairs and Sport. Year 2007  
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