(1)如图,已知点C在线段AB上,且AC=5cm,BC=3cm,点M,N分别是AC,BC的中点,求线段MN的长度.
(2)若点C是线段AB上任意一点,且AC=a,BC=b, 点M、N分别是,AC,BC的中点,请直接写出线段MN的长度(用含a,b的代数式表示)
(2)若点C是线段AB上任意一点,且AC=a,BC=b, 点M、N分别是,AC,BC的中点,请直接写出线段MN的长度(用含a,b的代数式表示)
![](https://img.xkw.com/dksih/QBM/2019/2/1/2131131592138752/2132020217602049/STEM/8d5b3a94ee9f45a9a613c5281812cfe5.png?resizew=158)
更新时间:2019-02-02 15:09:08
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解答题-问答题
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适中
(0.65)
【推荐1】如图,点
在线段
上,点
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/4db80447-1221-4274-9582-976556f25247.png?resizew=242)
(1)若
,求线段
的长;
(2)若
为直线
上线段
之外的任一点,且
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ed1fce01430ae31294c29d626626f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/4db80447-1221-4274-9582-976556f25247.png?resizew=242)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db75bc314cb493dfb2214849c25d064d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/9751aad480a18977a273c3d8db3293d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知点
在同一条直线上,
分别是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/81150047-451f-4fbb-bca7-e87d4ae654d9.png?resizew=246)
(1)求线段
的长;
(2)把线段
放在一条数轴上,若点
对应的数是
,点
对应的数是1,求点
对应的数;
(3)若点
从点
出发,以每秒2个单位的速度沿
移动,同时点
从点
出发,以每秒1个单位的速度沿
移动,当
两点之间的线段长为3时,求
两点运动的时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516983449108347c9bbf5dd2a72ab3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57e3727b7bbd795b05332fbf9649e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977ab80da22c4ab5867877d325513dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af0b32fda1f3fefa3426bbe53fbb991.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/81150047-451f-4fbb-bca7-e87d4ae654d9.png?resizew=246)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)把线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57e3727b7bbd795b05332fbf9649e9.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab4cf09670861e61d67cbe70bb149a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab4cf09670861e61d67cbe70bb149a9.png)
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