如图,已知点A,D,C,F在同一条直线上,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fc810ec7de21c800648dc02f1cf64b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da8fe8f5f8a3f17561d70652ad1172a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/2a6c02d0-5a7c-4dac-aea0-0f9cbe0d024a.png?resizew=133)
更新时间:2023-12-11 14:47:53
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解答题-问答题
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较易
(0.85)
【推荐1】填空完成推理过程:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/e45f0490-614b-4743-84d2-3111274463cc.png?resizew=122)
如图,
(已知)
=
( )
(已知)
( )
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/e45f0490-614b-4743-84d2-3111274463cc.png?resizew=122)
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2436e09ebe8b396b84502a51c0892f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0df2580b7ccfe98379d8ba1abdfd195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9956666b18e8a96f9bfc27ab6236334a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1806a639715fb7384ae37e68daf2e3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835dee43dcb6ee777fba8cfbfbf63632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e25c0bf06db0fe9f3912cbb50607f7.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,
,
,求证:
.
![](https://img.xkw.com/dksih/QBM/2021/10/3/2821501002506240/2822100865368064/STEM/b282d1f65a7e48bdbbf0de58284db44c.png?resizew=185)
证明:∵
∴
________
在
________和
________中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e62d19773ebee27e8d57163e47684e2.png)
∴________
________(________)∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d6404e43d054e28c3beb54af8e4013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://img.xkw.com/dksih/QBM/2021/10/3/2821501002506240/2822100865368064/STEM/b282d1f65a7e48bdbbf0de58284db44c.png?resizew=185)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d6404e43d054e28c3beb54af8e4013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d643e5f03b4beb241fd5896e7d31d3e.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e62d19773ebee27e8d57163e47684e2.png)
∴________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7465c3848d832ec772b6c1510d61aa59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
您最近一年使用:0次