| 
                
		                
		The figure below shows a triangle ABC. Lines 
		DE, FG, and HM passing through a point O, are parallel to AC, BC, and AB, 
		respectively. If S1, S2, S3, S4, S5, 
		and S6, 
		are the areas of the shaded regions, prove that:
		 . 
 
 
				 
 
						
  
      Sketch and typography of problem 854 using iPad Apps
				 
 |