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Please help ASAP! 

 Jan 25, 2019
 #1
avatar+18754 
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Total circumf = 2 pi r

                     = 40 pi

 

Fraction of circumference  =   45/40pi        

2pi radians in a full circle.....the fraction of this  is       45/40pi * 2pi = 90/40 R = 2.25R

 Jan 25, 2019

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