填补下列证明过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/09666786-3a1d-483c-a5af-a05158ffc2bd.png?resizew=142)
如图,△ABC中,D是边BC的中点,延长AD到点E,且
.
求证:△ABD≌△ECD.
证明:
∵
(已知)
∴∠B=∠DCE ( ).
∵D是边BC的中点(已知)
∴ .
∵AE、BC相交
∴∠ADB=∠EDC ( ).
在△ABD和△ECD中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f3f7bdcb7d2d422f9d7abd83dd6832.png)
∴△ABD≌△ECD ( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/09666786-3a1d-483c-a5af-a05158ffc2bd.png?resizew=142)
如图,△ABC中,D是边BC的中点,延长AD到点E,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126fdae0b1adc7361f945187b861fb20.png)
求证:△ABD≌△ECD.
证明:
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126fdae0b1adc7361f945187b861fb20.png)
∴∠B=∠DCE ( ).
∵D是边BC的中点(已知)
∴ .
∵AE、BC相交
∴∠ADB=∠EDC ( ).
在△ABD和△ECD中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f3f7bdcb7d2d422f9d7abd83dd6832.png)
∴△ABD≌△ECD ( ).
更新时间:2022-09-23 09:20:52
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,已知
,一条直线分别交
、
于点E、F,
,
,点Q在
上,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/e87894c8-a1ab-4673-9a96-ca394c711c51.jpg?resizew=150)
(1)已知
,直接写出
的度数;
(2)求证:
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173cea931c4988da31b3dd3ae1b47f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac3db9e03aaae5680cf0c83c3d3fc35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bdbbd3084ddc946e12d530d2192522.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/e87894c8-a1ab-4673-9a96-ca394c711c51.jpg?resizew=150)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97210c404b6b006fddc595c628fe1242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547139bcfad65df896be5c87243913bc.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5754ed0cdc3305585f34eb0c8345fad.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知
,直线
分别交
、
于点
、
,
平分
交
于点
,若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4a63d14654c66cc71bf26293d698ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18104b46692bd03c473fa81c38e49ca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54ccc7d2f8af35a252977d6e2af4663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/2019/9/6/2284987331141632/2285095986208768/STEM/6bc58ad87fde4af8b9a5d250d7416c16.png?resizew=192)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在
中,
,
,
平分
,
,垂足为点E,
和
的延长线交于点F.
![](https://img.xkw.com/dksih/QBM/2020/12/11/2612089336479744/2614195495477248/STEM/b3af1574c9e04a6e889ba44a439ccb91.png?resizew=260)
(1)求证:
.
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4611ceb2a28f7a7e4d24266d7f99b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/2020/12/11/2612089336479744/2614195495477248/STEM/b3af1574c9e04a6e889ba44a439ccb91.png?resizew=260)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29358240199ab3e742acf38516e75b35.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6280aa06e9df81653cff529c320419.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图所示,在△ABC中,AD⊥BC于D,CE⊥AB于E,AD与CE交于点F,且AD=CD,
(1)求证:△ABD≌△CFD;
(2)已知BC=7,AD=5,求AF的长.
(1)求证:△ABD≌△CFD;
(2)已知BC=7,AD=5,求AF的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/a2e98c45-67ba-4238-b4c0-8d2da04b696a.png?resizew=156)
您最近一年使用:0次