Circle O has a circumference of 36tt cm. what is length of the radius r
       
      
                
     
    
    
    
    
    2 answers:
            
              
              
                
                
Answer:
 5.73cm
Step-by-step explanation:
Given parameters: 
Circumference of the circle = 36cm
Unknown
Length of the radius = ? 
Lets represent the radius by r
Solution
The circumference of a circle is the defined as the perimeter of a circle. The formula is given as: 
             Circumference of a circle = 2πr 
 Since the unknown is r, we make it the subject of the formula: 
            r = 
           r =  =
 =  = 5.73cm
 = 5.73cm
 
                                
             
                    
              
              
                
                
Answer:
The radius = 18 cm.
Step-by-step explanation:
I am assuming that is 36π.
If so, then  circumference  = 2 π r and:
2 π r =  36 π
r  = 36π / 2π
r = 18.
 
                                
             
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