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正方形中最大圓的直徑就是正方形的邊長. 設圓的半徑為r,直徑為d,根據S=π*r²; 因π*r²;=60π取近似值3.14,故r≈4.37,d=8.74 假設正方形的面積S1,根據面積等於邊長的平方,則S1=d²;≈76.39 所以正方形的面積約為76.39cm²;
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