If a square has an area of 400 square miles, what is the length of each side of the square?

To find the length of each side of a square when the area is known, you can use the following formula:

• Area = side × side
• Area = side²

Given that the area of the square is 400 square miles, you can set up the equation:

side² = 400

To find the length of one side, take the square root of both sides:

side = √400

Calculating the square root, we find:

side = 20

Therefore, the length of each side of the square is 20 miles.

So, if you’re ever faced with a similar problem, just remember to use the formula for the area of a square, and you’ll be on your way to finding the side length in no time!