如图,点B,F,C,E在一条直线上,∠A=∠D,AC=DF,且AC∥DF.求证:△ABC≌△DEF.
![](https://img.xkw.com/dksih/QBM/2019/8/9/2265226534584320/2265298604343296/STEM/2dfaefc44c6448879128509e9a186acb.png?resizew=198)
更新时间:2019-08-09 22:24:43
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【知识点】 全等的性质和SAS综合(SAS)解读
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【推荐1】如图,在正方形
中,E、F分别是
和
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/24a8b8c4-bf7b-4d6e-b005-ada6bd1c287b.png?resizew=144)
(1)求证:
;
(2)若
平分
,且正方形
的面积为36,连接
,点P为线段
上一个动点,
,
,垂足分别为G、H.则
_____.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/24a8b8c4-bf7b-4d6e-b005-ada6bd1c287b.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9f501137809dba21dfab7dd56f68f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7316430d26a6f4bcc0bdadfd1a5330a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68cba824730fb8b30bc10159181d32ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8846f173590d790bccb5f104d5e01d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c6931ccf87c0adf8be8667edf92140.png)
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【推荐2】在边长为1的正方形ABCD中,点E是射线BC上一动点,AE与BD相交于点M,AE或其延长线与DC或其延长线相交于点F,G是EF的中点,连接CG.
![](https://img.xkw.com/dksih/QBM/2022/3/10/2933350270140416/2934123584552960/STEM/34b5ada6e1954ccda185136b69312655.png?resizew=250)
(1)如图1,当点E在BC边上时.求证:CG⊥CM.
(2)如图2,当点E在BC的延长线上时,(1)中的结论是否成立?请说明理由.
(3)在点E运动过程中,当BE的长度多少时,△MCE是等腰三角形?请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/3/10/2933350270140416/2934123584552960/STEM/34b5ada6e1954ccda185136b69312655.png?resizew=250)
(1)如图1,当点E在BC边上时.求证:CG⊥CM.
(2)如图2,当点E在BC的延长线上时,(1)中的结论是否成立?请说明理由.
(3)在点E运动过程中,当BE的长度多少时,△MCE是等腰三角形?请说明理由.
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