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          This math image could be recreated using  vector graphics as an  SVG file. This has several advantages; see  Commons:Media for cleanup for more information. If an SVG form of this image is already available, please upload it. After uploading an SVG, replace this template with {{ vector version available|new image name.svg}}. | 
         
        
        Summary 
        Image of concave regular polyhedron, great Icosahedron, U53.
        Uploaded by  Tomruen.
         Licensing 
        
         
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          The copyright holder of this file,  Robert Webb, allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted. | 
         
         
          | Attribution: Attribution must be given to Robert Webb's  Stella software as the creator of this image along with a link to the website:  http://www.software3d.com/Stella.php. A complimentary copy of any book or poster using images from the Software would also be appreciated where feasible. Attribution 
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          The permission to use this work has been archived in  the Wikimedia OTRS system. It is available as  ticket #2011112810034763 for users with an OTRS account. If you wish to reuse this work elsewhere, please read the instructions at  COM:REUSE. If you are a Commons user and wish to confirm the permission, please leave a note at the  OTRS noticeboard. Ticket link:  https://ticket.wikimedia.org/otrs/index.pl?Action=AgentTicketZoom&TicketNumber=2011112810034763  
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        The following pages on Schools Wikipedia link to this image (list may be incomplete):