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the please find perimeter

 Feb 15, 2020
 #1
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The outer arc is  50/360 ths of the outer circle:  (50/360)(2·pi·8)

The inner arc is  50/360 ths of the inner circle:  (50/360)(2·pi·3.5)    [8 - 4.5  =  3.5]

The line segments are each 4.5 cm in length.

 

Add all four values to get your answer.

 Feb 15, 2020
 #2
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Perimeter   P = 2 * 4.5 + ( 2 * 8 * pi * 50/360 ) + ( 2 * 3.5 * pi * 50/360 )  smiley

                                      

 Feb 16, 2020

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