如图,点A,D,B,E在同一直线上,AC=DF,AD=BE,BC=EF.
求证:AC
DF.
求证:AC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/2022/7/12/3020987370528768/3021054244814848/STEM/6d8e9f63e77645a688adad90f5da67fd.png?resizew=141)
更新时间:2022-07-12 16:53:30
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【推荐1】如图,EB∥DC,∠C=∠E,请你说出∠A和∠ADE有何关系?并说明你的理由.
![](https://img.xkw.com/dksih/QBM/2019/3/15/2161035724636160/2162472194744321/STEM/e97061f6dcd54d609579a6e80bb65f48.png?resizew=151)
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【推荐2】如图,
中,
,D为
边的中点,F为
的延长线上一点,过点F 作
于G点,并交
于E点,试说明下列结论成立的理由:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/31152859-5424-4b7e-8901-c80e04955ef8.png?resizew=108)
(1)
;
(2)
是等腰三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7699dd30e08702bfc6499eb9c89e54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/31152859-5424-4b7e-8901-c80e04955ef8.png?resizew=108)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7624d324f0ed1d90083d5d262f8cb487.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
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适中
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【推荐1】如图,△ABC是等边三角形,点D在△ABC外部,且DA=DC,连接BD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/a96f9b4c-383a-4fa0-b2dd-de338fd1b51a.png?resizew=198)
(1)判断BD和AC的位置关系,并说明理由.
(2)过点D作
交BC于点E,若BC=10,CF=4,求DE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/a96f9b4c-383a-4fa0-b2dd-de338fd1b51a.png?resizew=198)
(1)判断BD和AC的位置关系,并说明理由.
(2)过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066cd386723885c535ea720f5817847a.png)
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【推荐2】如图是由边长为1的小正方形组成的网格,每个小正方形的顶点叫做格点,
的顶点、点D以及点E在格点上.
(1)△ABC向上平移2个单位长度,再向右平移1个单位长度后得到△
,画出平移后的图形,并写出
的坐标 ;
(2)
的面积为 ;
(3)在网格中找格点F,使
与
全等,直接写出满足条件的所有F点坐标 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/8faa8d43-c953-4d7a-b4b6-5874b2af57a5.jpg?resizew=270)
(1)△ABC向上平移2个单位长度,再向右平移1个单位长度后得到△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1264a2e3609e1c274acb89b5ea5019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)在网格中找格点F,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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