1 . 在数轴上,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
______ ;
的中点的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8752f53440c9741620230f4462a5f605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed579e96ef84cec1a2536f0f54d2df44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2 . 已知点
,
,则线段
的中点坐标为_________ ,线段
的长度是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5934634b0e5695de6adb8b8071891479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07857e28633c077a3974672df89b6ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
3 . 若矩形ABCD的中心M在x轴上,点
,
,则点C的坐标为________ ,点D的坐标为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c80eabaf101288433b3b9e92a4805a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f855bbeb00d652786e768bc4fa64d74.png)
您最近一年使用:0次