$\"\"$

The base of the Eiffel Tower is a square.

Its area is $\"\"$ .

Area of a square is $\"\"$ , where s is side length. \ \

$\"\"$

$\"\"$ (Substitute: $\"\"$ )

$\"\"$ (Take square root to each side)

$\"\"$ (Write $\"\"$ )

$\"\"$ ft (Cancel squares and roots)

The side length s is $\"\"$ .

$\"\"$

The length of a side of the base is $\"\"$ .