|  |   | 
         
          | 
              
                | 
 
 
    
      | 
	
		
					| 
        
        
  
							
							 Geometry Problems 831-840: Quadrilateral, 
							Parallelogram, Congruence, Similarity, Metric 
							Relations, Concyclic Points, Equilateral. 
							Level: High School, College |  
			| 
  
    
      | 
		
		 |  |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 831Quadrilateral, Diagonal, Midpoint, Opposite Angles, Congruence, Parallelogram.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 832Quadrilateral, Isosceles triangle, 70-70-40 degrees, Congruence, Auxiliary lines, Equilateral triangle.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 833Parallelogram, Diagonal, Similarity, Proportion.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 834Parallelogram, Diagonal, Similarity, Geometric Mean, Mean Proportional.
 |  
      | 
		
		 | 
                
		                
		
		Typography of Geometry Problem 834Using iPad Pro Apps.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 835Isosceles Triangle, Double Angle, Triple Angle, Auxiliary Lines.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 836Parallelogram, Perpendicular, Diagonal, Similarity, Metric Relations.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 837Triangle, Orthocenter, Circumcenter, Circle, Concyclic Points.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 838Parallelogram, Perpendicular, Diagonal, Metric Relations.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 839Problem 839: Parallelogram, Perpendicular, Diagonal, Metric Relations.
 |  
      | 
		
		 | 
                
		                
		
		Geometry Problem 840Parallelogram, Perpendicular, Diagonal, Metric Relations, Similarity.
 |  
      | 
		
		 
 
  |  |  |  |  |  |  |  |  |