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Solve for the length of the midsegment.

 

 Mar 12, 2021
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 The mid segment is right between the lengths of the end segments.....it equals the 'average'  

 

( 4n+6    + 2n-2  ) /2        =     n+ 12

(6n +4)/2 = n+ 12

3n + 2 = n+ 12

2n = 10

n = 5                   use this 'n' to calc the line lengths

 Mar 12, 2021

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