Answer:60
Step-by-step explanation:I seen the answer on bill bye the math guy
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
C(0,0)
the length of AC is equal to BD
the length of BD is equal to AC
 
        
                    
             
        
        
        
Answer:

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Work Shown:

You could expand terms out and simplify, but I think it's more handy to leave it in this form so you can easily spot the center and radius from a glance.
 
        
                    
             
        
        
        
9.31 is the answer, in the decimal 31 has the greatest value