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[請問] 精確的圓面積
Nov 9th 2014, 00:43, by mijiu 

圓面積 半徑*半徑*3.14...
為什麼現在科技這麼發達
還沒有辦法計算出精確的圓面積

除了一般半徑*半徑*3.14
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