A traffic sign is in the shape of a square with each side equal to 20 inches. What is the area of the sign in square inches
The area of a square is found by multiplying the length of one side by itself. In this case, the length of one side is 20 inches.
Area = side length * side length
Area = 20 inches * 20 inches
Area = 400 square inches
Therefore, the area of the traffic sign is 400 square inches.