如图,已知BD是△ABC的中线,AB=5,BC=3,且△ABD的周长为11,则△BCD的周长是( )
![](https://img.xkw.com/dksih/QBM/2019/10/12/2310511799951360/2314051174760448/STEM/02833b3898a34603bdceafe2a8dca9f9.png?resizew=96)
![](https://img.xkw.com/dksih/QBM/2019/10/12/2310511799951360/2314051174760448/STEM/02833b3898a34603bdceafe2a8dca9f9.png?resizew=96)
A.11 | B.9 | C.7 | D.不能确定 |
更新时间:2019-10-22 21:08:58
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【知识点】 根据三角形中线求长度
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【推荐1】如图,AD,BE,CF依次是
ABC的高、中线和角平分线,下列表达式中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/f0963b51-34d4-4a25-add9-210ad484cc18.png?resizew=169)
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A.AE=CE | B.∠ADC=90° | C.∠CAD=∠CBE | D.∠ACB=2∠ACF |
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【推荐2】如图,已知BD是△ABC的中线,AB=5,BC=3,△ABD和△BCD的周长的差是( )
![](https://img.xkw.com/dksih/QBM/2018/6/12/1965686678323200/1967759211536384/STEM/baaa6525b564419e8c110ae7d4d93781.png?resizew=77)
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A.2 | B.3 | C.6 | D.不能确定 |
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