It depends on your goals.
typically it's B but it could be D
        
                    
             
        
        
        
Answer: A. 3 ways: k, DE, ED (both DE and ED have line markers over top)
To name a line, we just need two points on the line. We list them in any order because the line extends forever in both directions. Contrast this with a ray where order does matter. The little k is another way to name a line, potentially simplifying things.
Choice B is close, but it mentions ray DE instead of line DE. Choice C is missing line ED. Choice D is a similar story as choice B. These facts allow us to rule out B through D.
 
        
                    
             
        
        
        
If one angle is d° then it's supplement is
(180-d)°
        
             
        
        
        
Answer: 6.19
Step-by-step explanation: 106.25 divided by 17 is around 6.19. 
 
        
                    
             
        
        
        
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