A prism has a surface area of 50 mm2. Which sentence describes the effect of measuring the surface area in square centimeters?

Ok, so one way is, like this

divide it by 100 and change to square cm

the way to see why this works is like this

first, 1mm=1/10cm

so if the prism was flattened and cut and moved into a rectangle

let's say legnth was 10mm andn width was 5mm

convert each to cm

legnth is 1cm and width is 0.5

0.5cm^2 is the area