裏麵寫了，右邊兩塊小麵積加起來等於整個正方形麵積減去左邊四分之一的大圓。正方形16，大圓看第1條，4pi

來源: 偶爾短路於 2025-04-25 15:43:21 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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