Answer :
Final answer:
To convert 39.1 mm² to cm², divide by 100, resulting in 0.391 cm², because 1 cm² equals 100 mm².
Explanation:
To convert square millimeters to square centimeters, we need to recognize that 1 cm² is equivalent to 100 mm² because a centimeter is 10 millimeters.
Therefore, to convert from mm² to cm², we divide the number of mm² by 100. In the case of 39.1 mm², we would calculate:
39.1 mm² ÷ 100 = 0.391 cm².
Thus, there are 0.391 cm² in 39.1 mm².
