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Each side of a square piece of tissue paper is 10 centimeters long. What is the tissue paper's perimeter?

Each side of a square piece of tissue paper is $10\,\text{centimeters}$ long. What is the tissue paper's perimeter?

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Area and perimeter: word problems

Full solution

Q. Each side of a square piece of tissue paper is

10\,\text{centimeters}

long. What is the tissue paper's perimeter?

Recall formula for perimeter: Recall the formula for the perimeter of a square. The formula is $P = 4s$ , where $s$ is the length of one side.
Substitute side length: Substitute the side length into the formula. $s = 10$ cm, so $P = 4 \times 10$ .
Calculate perimeter: Calculate the perimeter. $P = 40\,\text{cm}$ .

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