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Rectangle;

 

Perimiter/circumference; 42

 

Side 1; 9

 

Side 2; 

Guest Oct 10, 2017
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+1

 

Perimeter  =   2 [ side 1 + side 2 ]

 

42  =  2  [ 9 + side 2]      divide both sides by 2

 

21  =  9 + side 2      subtract 9 rom both sides

 

12  = side 2

 

 

cool cool cool

CPhill  Oct 10, 2017

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