The perimeter of a square with side length s is 4s. If the perimeter is 20, find s.

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Multiple Choice

The perimeter of a square with side length s is 4s. If the perimeter is 20, find s.

Explanation:
For a square, the perimeter is four times the side length. If the perimeter is 20, divide by 4 to find the side length: s = 20 ÷ 4 = 5. A side length of 5 indeed gives a perimeter of 4 × 5 = 20, so it fits perfectly. Trying other side lengths would change the perimeter: 4 would give 16, 6 would give 24, and 10 would give 40. Therefore, the side length is 5.

For a square, the perimeter is four times the side length. If the perimeter is 20, divide by 4 to find the side length: s = 20 ÷ 4 = 5. A side length of 5 indeed gives a perimeter of 4 × 5 = 20, so it fits perfectly. Trying other side lengths would change the perimeter: 4 would give 16, 6 would give 24, and 10 would give 40. Therefore, the side length is 5.

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