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Think about it. Say you have a square with sides 3. The perimeter is 4*3, or 12. Now multiple each side by 1/3. That's 1x4 or 4.

The ratio of before:after is 12:4, or 3:1. Thus, any multiplication/division change you make to the sides of a square will be paralleled in the perimeter.

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Q: What happens to perimeter of square if sides are reduced to one third original length?
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