80 mm
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Well, isn't that just a happy little question! To find the perimeter of a square, you simply add up all the sides. Since all sides of a square are equal, you can multiply the length of one side by 4. In this case, with each side measuring 35 mm, the perimeter would be 35 mm + 35 mm + 35 mm + 35 mm = 140 mm. Just like that, you've found the perimeter of your square!
The perimeter is 60 mm
The perimeter is 20 cm
Area of square 400 so dimensions 20 x 20 making perimeter 80
Each side of the square is 272/4 = 68 mm