AB為什麽會垂直右下邊的那條長為20的邊？頂上那個三角形三邊為12，13，20 如何麵積為11X12/2

來源: wxcfan123 於 2023-11-23 15:05:59 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.