Each side of a square field is 100 meters long. What is the field's perimeter? (4) \( \square \) meters

To find the perimeter of a square, you simply add up the lengths of all four sides. Since each side is 100 meters long, the calculation looks like this: 100 m + 100 m + 100 m + 100 m = 400 m. So, the field's perimeter is 400 meters! Interestingly, the concept of perimeter has been around for centuries! Ancient architects and engineers used these calculations while designing structures and planning cities. Knowing the perimeter not only helped them understand space but also aided in resource allocation, marking boundaries, and even in the art of gardening.