The area of a square is 221 square millimeters. Which measurement is closest to the side length of this square in millimeters?
A 110.5 mm
B 59.6 mm
© 55.3 mm
• 14.9 mm
To find the side length of the square, we take the square root of the area.
√221 ≈ 14.9 mm
Therefore, the closest measurement to the side length of the square in millimeters is option D: 14.9 mm.