AREA OF SQUARE HELP

Question

Here's the question:

 

The area of a square is 324 cm^2. What is the side length of the square? Show your work and units.

Answer 1

The area of a rectangle is length*width. In a square, length=width, therefore the area is side*side. Since the area of the square is 324 cm², the length of one side is the square root of 324 or 18 cm.