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OpenStudy (anonymous):
What the lenght of.an area of.20cm.
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OpenStudy (anonymous):
what shape?
OpenStudy (anonymous):
I'll just assume a square, I suppose. A=s^2 for squares, where s is the length of a side. Here, A=20, so 20=s^2 sqrt(20)=s sqrt(4*5)=s 2sqrt(5)=s
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