+0  
 
0
274
1
avatar+176 

https://vle.mathswatch.co.uk/images/questions/question2723.png

 Nov 7, 2017
 #1
avatar+98044 
+2

8pi   = 2pi (radius)

 

[ 8pi ] / [ 2pi]  =  (radius)  =   4 cm 

 

 

cool cool cool

 Nov 7, 2017

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