Golden rectangle

<p>In <a href="/facts/Geometry/wTQf5ffQ">geometry</a>, a golden rectangle is a <a href="/facts/Rectangle/mdLfIGKA">rectangle</a> with side lengths in <a href="/facts/Golden_ratio/anloSRmD">golden ratio</a> 
  
    
      
        
          
            
              
                1
                +
                
                  
                    5
                  
                
              
              2
            
          
        
        :
        1
        ,
      
    
    {\displaystyle {\tfrac {1+{\sqrt {5}}}{2}}:1,}
  
 or ⁠
  
    
      
        φ
        :
        1
        ,
      
    
    {\displaystyle \varphi :1,}
  
⁠ with ⁠
  
    
      
        φ
      
    
    {\displaystyle \varphi }
  
⁠ approximately equal to 1.618 or 89/55.
</p><p>Golden rectangles exhibit a special form of <a href="/facts/Self-similarity/9Nvo7edY">self-similarity</a>: if a square is added to the long side, or removed from the short side, the result is a golden rectangle as well.
</p>

Golden rectangle open-in-new

Golden rectangle