如图B、C两点把线段AD分成2:4:3三部分,点M是AD的中点,MC=3cm,求线段AD的长度.
![](https://img.xkw.com/dksih/QBM/2021/12/22/2877745023418368/2883894446333952/STEM/59fcbc38-ff76-428e-890a-761bfc8ccf2d.png?resizew=308)
更新时间:2021-12-30 22:01:10
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相似题推荐
解答题-作图题
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适中
(0.65)
【推荐1】如图,C,D是线段
上的点,点E在线段
上,点F在线段
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/aa6399ec-5de0-449c-8c79-357603bbee03.png?resizew=210)
(1)用直尺和圆规作点E和R(要求:不写作法,保留作图痕迹)
(2)若点E是
的中点,
,求线段
的长,
(3)若
,且
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1760ea2450fbda88ecdf6a63068774a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/aa6399ec-5de0-449c-8c79-357603bbee03.png?resizew=210)
(1)用直尺和圆规作点E和R(要求:不写作法,保留作图痕迹)
(2)若点E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a5ab1f9461b28c89126ef065bc1016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79883bd2a555c10f3b1a0b0f99eebe57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df384789e5b667d116e8ad396c9128d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】在数轴上有A、B两点,它们对应的数分别是
和12,线段
在数轴上运动(点C在点E的左边),且
,点M为
的中点.
(1)如图1,当线段
运动到线段
之间(点C、点E两点均在A、B两点之间)时,
.
①直接写出
______;
②求点C对应的数及线段
的长;
(2)如图2,当线段
运动到点A在点C、点E两点之间时,画出草图,并求出
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73538c09794f3223540bfe074edff82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/55584673-781e-4569-9a5b-af3b33c1ed72.png?resizew=403)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/aba29431-3367-48c4-8abb-7f82dc4e08c5.png?resizew=399)
(1)如图1,当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee73d637e8260733851b10b322b9cd6.png)
①直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
②求点C对应的数及线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
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