A square has an apothem measuring 2.5 cm and a perimeter of 20 cm.What is the area of the square, rounded to the nearest square centimeter?

A square’s side length is its perimeter divided by 4: 20 ÷ 4 = 5 cm. Its area is 5 × 5 = 25 cm², which is already a whole number. The apothem of a square is half its side length, so 2.5 cm is consistent with a 5 cm side. The correct choice is 25 cm².

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