   neutral   TV towers are usually thicker at the bottom than at the top. They ’ re not perfectly cylindrical.     neutral   This is the world ’ s largest sports stadium. It ’ s a massive oval.  
    neutral   What sports do they play there?     neutral   It says here that it ’ s m mainly used for big football matches and athletics meetings.  
    neutral   Is that building a perfect cube?     neutral   
 No, I don ‘ t think so. 
 I don't believe all building are. That one must be an excellent mathematician! How