A square has an apothem measuring 2 point 5 centimeters and a perimeter of 20 centimeters What is the area of the square, rounded to the nearest square centimeter?

For a square, the apothem is half the side length, so a 2.5-centimeter apothem means each side is 5 centimeters. This agrees with the perimeter, since 4 × 5 = 20 centimeters. The area is 5 × 5 = 25 square centimeters, so the correct choice is A, 25 cm squared.

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