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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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           | Description | 
           
             English: Tetrahedron. 
            Русский: Тетраэдр. 
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           | Date | 
           
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           | Source | 
           Vectorisation of  Image:Tetrahedron.jpg | 
          
          
           | Author | 
            User:DTR | 
          
          
           Permission ( Reusing this file) | 
           
            
             
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              Permission is granted to copy, distribute and/or modify this document under the terms of the  GNU Free Documentation License, Version 1.2 or any later version published by the  Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled  GNU Free Documentation License.  http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue 
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           This  vector image was created with  Inkscape. | 
          
         
         
        
        
        
       File usage
       
        The following pages on Schools Wikipedia link to this image (list may be incomplete):
        
        
       
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