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                51.
				Seven Circles 
				Theorem 
    
									
				  
  	 
  
  
  
          
  
    
      |  53. Angle 
		between two Simson lines Proof | 
     
   
  
  	
          
  
    
      |  54. 
		Steiner's Theorem. 
		Proof | 
     
   
  
          
  
    
      | 
         55. 
		100� Isosceles Triangle Problem | 
     
   
	
                56. 
				Triangles 
    
				  
	 
	
                57.
				Triangle with the 
				bisectors of the exterior angles. 
				Collinearity 
       
				
				  
	 
	
                58.Triangle 
				and squares. 19 theorems, visual 
				illustrations.  
				
				   
				
				  
	 
	
                59.
				Triangle 
				with Squares 0 Two squares. 
     
				
		  
  	 
	  
  
    
      | 
         60. Triangle with Squares 1: Two squares 
		Proof | 
     
   
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