The area of a square game board is 144 sq. in. What is the length of one of the sides of the board?

So we want to know what is the lenght of the sides of the board that has an area of A=144 in^2. Well, we know that the area of a square is A=a^2 where a is the side of a square. So the length of the side is square root of the area: sqrt (144) = 12. So the length of the game board is 12 inches.