1. **State the problem:** Find the perimeter of a square with side length 3.5 cm.
2. **Formula:** The perimeter $P$ of a square is given by
$$P = 4 \times \text{side}$$
This is because a square has 4 equal sides.
3. **Substitute the given side length:**
$$P = 4 \times 3.5$$
4. **Calculate:**
$$P = 14$$
5. **Answer:** The perimeter of the square is 14 cm.
Square Perimeter 22F902
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