A baseball infield contains the shape of a square measuring 30 yards on each side. What is the area of the baseball infield?
A. 8,100 square yards
B. 120 square yards
C. 90 square yards
D. 900 square yards
A. 8,100 square yards
To find the area of a square, you multiply the length of one side by itself. In this case, 30 yards * 30 yards = 900 square yards.