如图,已知
、
、
在一直线上
,
平分
,请填写
的理由.
解:因为
平分
___________
,
所以
___________
.
因为
___________
,
所以
___________
,
___________
.
所以
___________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e932b4add3175358f15be0e1f7104e79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
解:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06496ce29e301bbfccd6acaa110eb877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3b1dae128a2e3e13c93ee3a01430d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be8930f4fe8078cd596dbb6fcb494cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18825f7aeeb79a5e6ec3431440c6b368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c99bcccd6ab55de55ab75dde04b77a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8549f3bf08842465dddf04b71a34efa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
2024七年级下·上海·专题练习 查看更多[1]
(已下线)上海市七下期中真题精选(基础60题16个考点分类专练)-2023-2024学年七年级数学下学期期中考点大串讲(沪教版)
更新时间:2024-04-26 11:06:14
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