有關AB5CD3的精選大全

如圖,AB∥CD,E,F分別為AC,BD的中點,若AB=5,CD=3,則EF的長是(  )A.4       ...
問題詳情:如圖,AB∥CD,E,F分別為AC,BD的中點,若AB=5,CD=3,則EF的長是()A.4               B.3          C.2                 D.1【回答】D.連接DE並延長交AB於H.∵AB∥CD,...
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