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A circle with center A and radius three inches is tangent at to a circle with center B, as shown. If point B is on the small circle, what is the total perimeter of the shaded region? Express your answer in terms of pi.

 

 May 29, 2021
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The  total  perimeter   of  the  shaded  region   is  just  the  sum  of the  perimeters  of both  circles  =

 

2pi [ 3  +  6  ]   =

 

18  pi    inches

 

 

cool cool cool

 May 29, 2021
edited by CPhill  May 29, 2021

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