Answers

2016-02-13T11:29:59+08:00
Perimeter of a square-a+a+a+a
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2016-02-13T12:59:42+08:00
First, know the length of the sides of the polygon. Then, add them all, and there it is, you have the perimeter.
For circle, we have this formula: 2πr or 2 × π × radius. But it's not called perimeter it was called circumference.
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