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Calculate the area of the shaded region in each figure. 

 

 Apr 22, 2020
 #1
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In each case, find the area of the outer figure and subtract the areas of the inner figures.

 

1)  Area of the outer figure:  A  =  12 cm x 12 cm  =  -------       

      Area of an inner circle:  A  =  pi·32  =  --------                       

      Area of the other circle:  A  =  pi·32  =  --------                     

      Final answer:  answer #1 - answer #2 - answer #3  =  -------

 

2)  The radius of the outer circle is 8 cm + 4 cm  =  12 cm.

     Area of the outer circle:  A  =  pi·122  =  -------                     

     Area of the top inner circle:  A  =  pi·42  =  -------                 

     Area of the bottom inncer circle:  A  =  pi·82  =  --------         

     Final answer:  answer #1 - answer #2 - answer #3  =  -------

 Apr 22, 2020

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