問題詳情
如圖(四)，小曄將一個直徑為2公分的壹圓硬幣，緊沿著一個邊長為6公分的正三角形周界繞一圈，求：掃過的面積為 平方公分。
參考答案
答案：A
難度：困難0.396825
統計：A(50),B(7),C(39),D(18),E(0)
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