根據托勒密定理，即圓內接四邊形的兩組對邊乘積之和等於兩條對角線的乘積，也能得AO/OD=4/3

來源: 萬斤油於 2022-05-05 17:26:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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