Answer
$100\ mm^2$
Work Step by Step
We use unit conversions to solve this problem:
$1cm^2=1cm^2\times(\frac{10mm}{1cm})^2=1cm^2\times\frac{100mm^2}{1cm^2}=100mm^2$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.