已知点C,点D,点E都在线段AB上,
,点D是线段AC的中点.
(1)如图①,若点E是线段BD的中点,当
时,求CE的长;
(2)如图②,若点E是线段BC的中点,当
时,求DE的长(用含a的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e6ca1f0d3577fc45d0dcc959af6471.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/a71f3458-7850-4cd7-bd13-86dbac74aaa8.png?resizew=393)
(1)如图①,若点E是线段BD的中点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
(2)如图②,若点E是线段BC的中点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b9fb616a125f49b4b68057c62aa80c.png)
20-21七年级上·浙江杭州·期末 查看更多[1]
(已下线)【新东方】【杭州】 8【2020年】【初一上】【期末考】
更新时间:2020-01-09 11:39:35
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相似题推荐
解答题-计算题
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【推荐1】如图,已知线段
和
的公共部分
,线段
、
的中点
、
之间的距离是
,求
、
的长,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/903ab59b971b400fe58ee57cd11fa592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/ab167f32-84a4-47dd-9830-51ef3696cfa4.png?resizew=248)
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解答题-问答题
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【推荐2】如图,
,延长
到
,使
,
是线段
的中点.
![](https://img.xkw.com/dksih/QBM/2023/7/27/3289811321741312/3291466704494592/STEM/12fd630d925d4d32954715a7a114f3ed.png?resizew=361)
(1)求线段
的长度;
(2)若点
是线段
的三等分点,直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee49e97546d466ba3ee630e08cdc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e0cdfb6d592897c6485ce1741677846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2023/7/27/3289811321741312/3291466704494592/STEM/12fd630d925d4d32954715a7a114f3ed.png?resizew=361)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐1】如图,点A、B在线段
上,点M、N分别是线段
、
的中点,
,若
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4186ad45ec24f5c2844ff968a9ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02f2cce7361a3ea77a4d4d9147faca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2022/1/4/2894187817869312/2951822740545536/STEM/9132c992-2906-4e19-9621-9559fe863a8e.png?resizew=298)
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解答题-问答题
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适中
(0.65)
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【推荐2】如图,线段
是线段
上一点,M是
的中点,N是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757834515947520/2757886343028736/STEM/6de80678024a46e49355661188fba943.png?resizew=327)
(1)
,求线段
的长;
(2)若线段
,线段
,求
的长度(
用含
的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01765866cf6aa15320187718398f90d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757834515947520/2757886343028736/STEM/6de80678024a46e49355661188fba943.png?resizew=327)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818309e7b9a67c54ab1530fdb4b0edc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20455d3dfcef60c9f702d38c4b1e5269.png)
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15fcde639611cd140a6ffcd336bc5e27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890aea25780f7ba34adb23e799808462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
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