如图,将矩形纸片
沿着过点D的直线折叠,使点A落在
边上,落点为F,折痕交
边于点E,
(1)求证:
;
(2)若
,求
的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8094b547ecd7a0e7fcde4caffb08dd6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/951b483c-f2b2-4bc4-83eb-062d8a119e67.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/979097265dc891d2c1bef3967d89fc8a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e046ae4f4375f58cdda02121c6d93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
更新时间:2022-11-02 09:43:50
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名校
【推荐1】如图,网格中每个小正方形的边长均为
,线段
,线段
的端点均在小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/20141f17-f888-471e-b955-4142a0d3402b.png?resizew=276)
(1)在图中画以
为斜边的等腰直角
,顶点
在小正方形的格点上且在
下方;
(2)在(1)的条件下,在图中以
为边画直角
,点
在小正方形的格点上,使
,且
的面积为6,连接
,并直接写出
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/20141f17-f888-471e-b955-4142a0d3402b.png?resizew=276)
(1)在图中画以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在(1)的条件下,在图中以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a618e2fa885d453e050c21bc05f8fed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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【推荐2】如图,在
中,
,
,D为BC边上一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/f379426d-c310-4fc0-9cda-fef6d685036b.png?resizew=154)
(1)求
的大小;
(2)求斜边BC的长;
(3)求斜边BC上的中线的长;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886d3f9d72d99005a9694c9ad8a6f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19427598a86f6c13e6a2d6da0fa3877e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/f379426d-c310-4fc0-9cda-fef6d685036b.png?resizew=154)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
(2)求斜边BC的长;
(3)求斜边BC上的中线的长;
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【推荐1】如图,矩形纸片
,点
在
上,将
沿
折叠,得到
,
,
分别交
于点
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/5f7a00a0-d9d1-4560-814c-b190fcdff5e6.png?resizew=156)
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7f32e4c7d1fcafc3fe0dbcf08fdd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc56d569d01f49141c3d764fba08f7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/5f7a00a0-d9d1-4560-814c-b190fcdff5e6.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb29dc024f8f554eaa879bac345aeb92.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
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【推荐2】如图,平面直角坐标系中有一长方形
,
在
轴上,
在
轴上,点
的坐标为
,将
沿
折叠
点与
点重合,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750819921174528/2751363640786944/STEM/a2c1fe53-65f7-4990-9f08-24553d9f2cea.png)
(1)求证:
;
(2)求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132de9682ce9a412b7b517aa209726ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5dbbbf7ad436476e8e062064d73c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cfce6bedc9e8962a4a8b9afce4d4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750819921174528/2751363640786944/STEM/a2c1fe53-65f7-4990-9f08-24553d9f2cea.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60957f7f5fd28daf2b5a8cbb3fde647.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐1】如图,B是AC上一点,AD⊥AB,EC⊥BC,∠DBE=90°.求证:△ABD∽△CEB.
![](https://img.xkw.com/dksih/QBM/2012/2/21/1573341380354048/1573341444481024/STEM/0d3aaf7467db403384fe800866c32b51.png?resizew=175)
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【推荐2】如图,在正
中,点
是
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/19f1588b-322a-43c5-bad1-afa2d3979d61.png?resizew=166)
(1)求证:
;
(2)连结
,交
于点
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e2b4b38ade03d53b57bc7c9259b407.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/19f1588b-322a-43c5-bad1-afa2d3979d61.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6643b9bb2d13dfdb29c273daef8507.png)
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a97527d6db8918c66eff281f0fd2997.png)
您最近一年使用:0次