(1)阅读理解:
如图①,在
中,若
,求
边上的中线
的取值范围.可以用如下方法:将
绕着点D逆时针旋转
得到
,在
中,利用三角形三边的关系即可判断中线
的取值范围是_______;
(2)问题解决:
如图②,在
中,D是
边上的中点,
于点D,
交
于点E,DF交
于点F,连接
,求证:
;
(3)问题拓展:
如图③,在四边形
中,
,
,
,以C为顶点作一个
的角,角的两边分别交
于E、F两点,连接EF,探索线段
之间的数量关系,并说明理由.
如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cbbe13ece058e5e014a8eaf435eb6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96715995549e5e48494101570bb3bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)问题解决:
如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efffb3e6a571832b723b3c5795b8e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da9b7f934bab7011daa609c8d020e977.png)
(3)问题拓展:
如图③,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173904239da66b7bef7cb1d997cc40ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce8ebe684ab4fd905deddd160462847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdc40f1bd736b060d195e899c13bd39.png)
更新时间:2024-01-06 20:29:48
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】
中,
,
,过点
作
,连接
,
,
为平面内一动点.
(1)如图1,点
在
上,连接
,
,过点
作
于点
,
为
中点,连接
并延长,交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709618777325568/2712488634720256/STEM/7e3b2513-bf5f-45b6-9ad0-3def00f263fe.png?resizew=217)
①若
,
,则
;
②求证:
.
(2)如图2,连接
,
,过点
作
于点
,且满足
,连接
,
,过点
作
于点
,若
,
,
,请求出线段
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cccf0722972c56821bf0410a46c14c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352152ad232cab3e56569da9c6f18102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709618777325568/2712488634720256/STEM/7e3b2513-bf5f-45b6-9ad0-3def00f263fe.png?resizew=217)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa18cc648d7ef8d17ce9d2368dd20922.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86da31bf6d13f2c34c82668bd132ba6.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed74f1136b474cf520ad76bc60367b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373c7c57430b08ed956e6844f4e0b9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280aab163462f26cfa1f28b6982737ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf8806f82176aef0769666545a43e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0972f8dc1e2a5720ea7bc57dfd9018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d0e0fd4895ebfdfd29c70a84bd76a67.png)
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![](https://img.xkw.com/dksih/QBM/2021/4/28/2709618777325568/2712488634720256/STEM/160a1c67-56ec-4b27-8801-23043af809e4.png?resizew=260)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,点P是∠BAC平分线AD上的一点,AC=9,AB=5,PB=3,则PC的长取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/6f7cc93e-d4f5-4127-9828-e9a363052d60.png?resizew=187)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】如图,在
的正方形网格中,每个小正方形的边长为1,
的顶点在网格的格点上(小正方形的顶点即为格点),借助网格完成以下任务.
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(1)在图中画出
的高
,中线
;
(2)先将
向左平移1格,再向上平移2格:
①在图中画出平移后的
,并分别标注出点
,
,
的对应点
,
,
;
②图中与
相等的角是________.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750503735255040/2750583519535104/STEM/c11ad57021214bd9bc82906ce9725467.png?resizew=241)
(1)在图中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)先将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①在图中画出平移后的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
②图中与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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【推荐2】如图,在△ABC中,AD为BC边上的中线,过B、C点分别作CE⊥AD于点E,BF⊥AD于F,求证:BF=CE.
![](https://img.xkw.com/dksih/QBM/2020/10/11/2568721576255488/2569397668233217/STEM/c3dd1d0c3e424598a2f6bc87dd58cfb8.png?resizew=163)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
平分
交
于点
,过点
作
交
的延长线于点
.若
是
上的一点,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74722509fe67828d8a092f9123bc570.png)
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【推荐2】如图,AB=AD.AC=AE,∠BAD=∠CAE.
(1)求证:△ABC≌△ADE;
(2)若AC=9,AD=12,BE=15,请你判断△ABE的形状并说明理由.
(1)求证:△ABC≌△ADE;
(2)若AC=9,AD=12,BE=15,请你判断△ABE的形状并说明理由.
![](https://img.xkw.com/dksih/QBM/2019/1/18/2121310543183872/2122255921414145/STEM/5c1331040ab64d4b8df33f082ad02519.png?resizew=163)
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解答题-问答题
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适中
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【推荐1】如图,在平面直角坐标系中,
的两条直角边分别落在x轴、y轴上,且
,将
绕原点O顺时针旋转
得到
,将
沿y轴翻折得到
与
交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2e5ca878-6f0c-4e99-a49e-e2821724d43b.png?resizew=164)
(1)若抛物线过点A,B,C,求此抛物线的函数表达式;
(2)点M是第三象限内抛物线上的一动点,点M在何处时可使
的面积最大?最大面积是多少?并求出此时点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1dc04ca41c0b83d58eed33be7b75a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284042c1165bc366bb7ad2a626be5fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c912b618a41cb9fa74b6c071ddbbf2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389cb487210a5c8d62eef723fd592476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2e5ca878-6f0c-4e99-a49e-e2821724d43b.png?resizew=164)
(1)若抛物线过点A,B,C,求此抛物线的函数表达式;
(2)点M是第三象限内抛物线上的一动点,点M在何处时可使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e8ecb371ce77dca5554e8e03b41386.png)
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真题
【推荐2】如图,面积为
的矩形
的边
、
分别在
轴、
轴的正半轴上,点
在双曲线
的图象上,且
.
(1)求
值;
(2)将矩形
以
旋转中心,顺时针旋转
后得到矩形
,双曲线交
于
点,交
于
点,求
的面积.
(3)在双曲线上是否存在一点
,使得直线
与直线
平行?若存在,请求出
点坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6e5a5f564ce575adff22501f08843f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3d814a5e87bf9969c779c306a27a81.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6e5a5f564ce575adff22501f08843f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21baa8642939d341db9f12592414ada0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631674408a1554bd783e5f569b39a8bb.png)
(3)在双曲线上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1b418d67b301ebfd7db583aa176e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/bdf871ba-d94d-4b44-be48-67f29bec9368.png?resizew=179)
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