Answer:
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Step-by-step explanation:
The question required attachment; however, follow the following steps to answer your question.
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Considering the horizontal plane of the gird.
Count the number of the squares in that plane;
This gives 4
Multiply 4 by length of each side of a square;
[tex]Perimeter = 8mm * 4[/tex]
[tex]Perimeter = 32mm[/tex]