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OpenStudy (anonymous):
A big square is formed from 9 small squares. The perimeter of each small square is 40 cm. Find the area of the big square.
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OpenStudy (anonymous):
\[P _{b} =9(40)=360\] \[4s=360\]
OpenStudy (anonymous):
\[A=s^2\]
OpenStudy (anonymous):
Thank you. C:
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