名校
1 . 【感知】如图(1)已知四边形
是圆O的内接四边形,
,易知
.(不用证明)
【拓展】在【感知】的条件下,
与
交于点E,已知
,
,求
的长.
【应用】已知
中
,点D为
中点,以
为斜边向上作等腰直角三角形,当
把
的面积分为
两部分时,
___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddd49625097d0a78df7170be4f882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91a6fff9a779065091063b10abc0aca.png)
【拓展】在【感知】的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
【应用】已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8817091d0f4b7d7ac6df560cb63c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e80bb0f244f283cd4c3faf809ba488d.png)
![](https://img.xkw.com/dksih/QBM/2022/4/21/2962783166963712/2963666643648512/STEM/2a12b005-5479-41b2-a06d-9af78ba94539.png?resizew=473)
您最近一年使用:0次
2022-04-22更新
|
209次组卷
|
3卷引用:吉林省第二实验学校2021-2022学年九年级下学期第二次月考数学试题(一模)
2 . 【基础问题】
如图①,矩形
中,点E为
边上一点,连接
,作
交
于点F,且
,求证:
.
【拓展延伸】
(1)如图②,点E为平行四边形
内部一点,
,作
交
延长线于点F,若
,则平行四边形
的面积为_________.
(2)如图③,在正方形
中,
,在
边上取一点E,使
,将
沿
翻折到
位置,作
于点F,在
右侧作
,则
面积的最大值为_________.
如图①,矩形
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f0805cc7a96c866df10b667ac4851e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c834a2ede139af87f2d1516b476a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db260bd36c07989cd2eb1739947fde3.png)
【拓展延伸】
(1)如图②,点E为平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e22bc3996c396810dcb191506f01800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b41fbe1fcf9e627166e026a1ae42cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659f0385527f2878e769a1a659abd642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)如图③,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d245076397a09d766cbeea4a4bece7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49292583fbc845c080fa5436aa52efb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34db85105967664ca0a8e10695f1aebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557f8ff92d79a9d464ff13de17f3eae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6513f5a6027522e7672150f3de6eef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2691486b3054b6653d170293d67b290e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/1ebd9cd9-c9a5-4e55-be67-b52527fa9a4e.png?resizew=450)
您最近一年使用:0次
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3 . 【解决问题】如图①,在四边形
中,
,点
是边
的中点,
,求证:
平分
.
提示:延长
交射线
于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbc619df1eee56ff0d8d4792f9c9f3d.png)
【应用】如图②,在矩形
中,点
是边
上的一点,将
沿直线
折叠,若点
落在边
的中点
处,则
______.
【拓展】在矩形
中,
,点
为边
的中点,将
沿直线
折叠,得到
,延长
交直线
于点
,直线
交边
于点
若
,
,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b5ea5627440c19999a9039eaa1c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f135ae4531e59a3c5a7c1e475a5e8934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e816627ed986ee824a52e94c76880015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbc619df1eee56ff0d8d4792f9c9f3d.png)
【应用】如图②,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8deae0ab9e7ed4863f73b1347cd73c26.png)
【拓展】在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7654b4dbc0f9ba23055f4cb65560a223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa4ecbe57994125c6d4cf3b272c5e37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21093eae7765f54a8de66750a63e1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b20cd1a43264e4533d4980c99fdad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/ef154fe7-1369-43b7-8710-8a5ddc508a2c.png?resizew=337)
您最近一年使用:0次
2022-11-09更新
|
223次组卷
|
2卷引用:吉林省长春市二道区赫行实验学校2022-2023学年九年级上学期期中数学试题
4 . 【教材呈现】表格是华师版九年级上册数学教材第
页的部分内容:
请用演绎推理写出证明过程.
【结论应用】
如图
在四边形
中,
,点
是对角线
的中点,
是
中点,
是
中点,
与
相交于点
求证:
;
【拓展延伸】
如图
,正方形
的边长为
,
的顶点
、
分别在边
、
上运动,
,
,
为边
中点,连接
则运动过程中
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4500d4031cbf22a456fa09fa393ba2b.png)
如图![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
【结论应用】
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a36a9dc09e4ed89c47993141ea124fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e498ddd40ad424e40b3674ed59e8c6ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/dd5dc77c-e657-452e-90b3-5d851090a660.png?resizew=579)
【拓展延伸】
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ba1496ebc168dabbc05b08ec3aa6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9f4fe60b81ff21ca2acc95848a643d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed206605371e1348d8a47e29b9c9e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5832d133d971e5a7193e5fc735f51489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
您最近一年使用:0次
名校
5 . [教材呈现]下面是华师大九年级上最数学教材第76页的部分内容.
如图,E是矩形ABCD的边CB上的一点,AF⊥DE于点F,AB=3,AD=2,CE=1,证明△AFD∽△DCE,并计算点A到直线DE的距离(结果保留根号).
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928794358333440/2930968876826624/STEM/3960a8e9-e1e9-4e33-83e7-464e344d3496.png?resizew=136)
结合图①,完成解答过程.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928794358333440/2930968876826624/STEM/8d3ef5f4-c84f-4218-af82-56feb5b691d3.png?resizew=425)
[拓展]
(1)在图①的基础上,延长线段AF交边CD于点G,如图②,则FG的长为 ;
(2)如图③,E、F是矩形ABCD的边AB、CD上的点,连接EF,将矩形ABCD沿EF翻折,使点D的对称点D'与点B重合,点A的对称点为点A'.若AB=4,AD=3,则EF的长为 .
如图,E是矩形ABCD的边CB上的一点,AF⊥DE于点F,AB=3,AD=2,CE=1,证明△AFD∽△DCE,并计算点A到直线DE的距离(结果保留根号).
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928794358333440/2930968876826624/STEM/3960a8e9-e1e9-4e33-83e7-464e344d3496.png?resizew=136)
结合图①,完成解答过程.
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928794358333440/2930968876826624/STEM/8d3ef5f4-c84f-4218-af82-56feb5b691d3.png?resizew=425)
[拓展]
(1)在图①的基础上,延长线段AF交边CD于点G,如图②,则FG的长为 ;
(2)如图③,E、F是矩形ABCD的边AB、CD上的点,连接EF,将矩形ABCD沿EF翻折,使点D的对称点D'与点B重合,点A的对称点为点A'.若AB=4,AD=3,则EF的长为 .
您最近一年使用:0次
2022-03-07更新
|
641次组卷
|
7卷引用:吉林省长春市第八十七中学2021-2022学年下学期九年级第一次模拟(开学考试)测试数学试题
吉林省长春市第八十七中学2021-2022学年下学期九年级第一次模拟(开学考试)测试数学试题2022年吉林省长春市第八十七中学中考数学一模试题(已下线)专题32 图形的变化(翻折与旋转变换)-解答题专项训练-备战2022年中考数学临考题号押题(全国通用)2023年河南省驻马店市泌阳县光亚学校九年级中考数学一模试题2022年湖南省长沙市天心区中考二模数学试卷2023年广东省广州市天河区新都学校中考一模数学试题(已下线)2023年河南省一模(几何综合2)
名校
6 . (1)【感悟】如图①,把直角三角板的直角顶点
放在破损圆形玻璃镜的圆周上,两直角边与圆弧分别交于点
、
,连接
,则线段
为圆形玻璃镜的直径.此操作体现的数学道理是:______.
(2)【应用】
如图②,
、
、
三点在
上且
,过点
作
垂直
的切线
于点
,若
,
.求
的长.
(3)【拓展】
如图③,已知
是等边三角形,以
为底边在
外作等腰
,点
为
的中点,连接
,请直接写出
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)【应用】
如图②,
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)【拓展】
如图③,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ce5d6ca24e249f7172e51c154509b2.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de35532913541d52cbc351762dff9a69.png)
![](https://img.xkw.com/dksih/QBM/2023/6/18/3262123502338048/3333348346642432/STEM/65cf4860dc5c4b22bd2fab8cd4f265b4.png?resizew=452)
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名校
7 . (1)特殊发现:
如图1,正方形
与正方形
的顶B重合,
、
分别在
、
边上,连接
,则有:
①
______;
②直线
与直线
所夹的锐角等于______度;
(2)理解运用
将图1中的正方形
绕点B逆时针旋转,连接
、
,
①如图2,(1)中的结论是否仍然成立?请说明理由;
②如图3,若D、F、G三点在同一直线上,且过
边的中点O,
,直接写出
的长等于______;
(3)拓展延伸
如图4,点P是正方形
的
边上一动点(不与A、B重合),连接
,沿
将
翻折到
位置,连接
并延长,与
的延长线交于点F,连接
,若
,则
的值是否是定值?请说明理由.
如图1,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4722c3f59d167b633b58e9b5874141.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(2)理解运用
将图1中的正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
①如图2,(1)中的结论是否仍然成立?请说明理由;
②如图3,若D、F、G三点在同一直线上,且过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)拓展延伸
如图4,点P是正方形
![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9596850884048064a3ec8bd48c4762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2c3dbafe88aef094bd2271d98e259d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2639c093658179960458699ad6df29e.png)
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2023-08-02更新
|
393次组卷
|
9卷引用:吉林省松原市2023-2024学年九年级上学期期末数学试题
吉林省松原市2023-2024学年九年级上学期期末数学试题2023年浙江省宁波市艺术实验学校中考一模数学试题2023年河南省洛阳市东方第二中学中考二模数学试题(已下线)专题08 四边形问题汇总-学易金卷:2023年中考数学一模试题分项汇编(浙江专用)江苏省无锡市惠山区2022-2023学年八年级下学期期末数学试题(已下线)2023年河南省二模(几何综合1)(已下线)专题03 图形的相似(十大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)2024年河南省中考数学模拟试题(已下线)易错模型02+相似模型2(十大易错分析+变式训练+易错题通关)-备战2024年中考数学考试易错题(全国通用)
8 . (1)【操作发现】如图①,在边长为1个单位长度的小正方形组成的网格中,
的三个顶点均在格点上.如果将
绕点A顺时针方向旋转
,点B的对应点为
,点C的对应点为
,连接
,此时
______;
(2)【问题解决】在某次数学兴趣小组活动中,小宇和同学遇到了如下问题:如图②,在等边
中,点P在内部,且
,
,
,求
的长.经过同学们的观察、分析、思考、交流、对上述问题形成了如下想法:将
绕点A按顺时针方向旋转
,得到
,连接
,寻找
、
、
三边之间的数量关系……请参考他们的想法,完成该问题的解答过程;
(3)【学以致用】如图③,在等边
中,
,点P在
内,
,
,求
的面积;
(4)【思维拓展】如图④,在四边形
中,
,垂足为E,
;
,
,
(k为常数),请直接写出
的长(用含k的式子表示).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/c2ce78a2-f0f1-4738-91f2-1d541d0bd3d4.png?resizew=381)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e435d643780ed87871dcc27fadda45.png)
(2)【问题解决】在某次数学兴趣小组活动中,小宇和同学遇到了如下问题:如图②,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac05da2814b773cef9628d7efff4f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f8c0c8a16d9e56d7db6a9d8657faf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)【学以致用】如图③,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e39bee1445161f91213c83b498b8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a665ba024f2840ce5aef3765249341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b47e792146e2f7d93a9ef9ad1294ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
(4)【思维拓展】如图④,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daab9a141223622f04b48993d7b32168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e24db47e37d968219b62b6a69712a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f93c1d089fb7f07c02e82e29184b4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/c2ce78a2-f0f1-4738-91f2-1d541d0bd3d4.png?resizew=381)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/c5594266-034f-4ccf-ac7e-966c34caedf8.png?resizew=174)
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真题
9 . 问题背景:
一次数学综合实践活动课上,小慧发现并证明了关于三角形角平分线的一个结论.如图1,已知AD是△ABC的角平分线,可证
=
.小慧的证明思路是:如图2,过点C作CE∥AB,交AD的延长线于点E,构造相似三角形来证明
=
.
=
;
(2)应用拓展:如图3,在Rt△ABC中,∠BAC=90°,D是边BC上一点.连接AD,将△ACD沿AD所在直线折叠,点C恰好落在边AB上的E点处.
①若AC=1,AB=2,求DE的长;
②若BC=m,∠AED=
,求DE的长(用含m,
的式子表示).
一次数学综合实践活动课上,小慧发现并证明了关于三角形角平分线的一个结论.如图1,已知AD是△ABC的角平分线,可证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea79586df2029edb34c7cb2f67dc3722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2abe5da7ee1a2ff3ca5dec7a2d04dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea79586df2029edb34c7cb2f67dc3722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2abe5da7ee1a2ff3ca5dec7a2d04dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea79586df2029edb34c7cb2f67dc3722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2abe5da7ee1a2ff3ca5dec7a2d04dc.png)
(2)应用拓展:如图3,在Rt△ABC中,∠BAC=90°,D是边BC上一点.连接AD,将△ACD沿AD所在直线折叠,点C恰好落在边AB上的E点处.
①若AC=1,AB=2,求DE的长;
②若BC=m,∠AED=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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2022-06-22更新
|
2112次组卷
|
31卷引用:吉林省长春市第一〇八学校2022-2023学年九年级上学期月考数学试题
吉林省长春市第一〇八学校2022-2023学年九年级上学期月考数学试题2023年吉林省松原市前郭县西部学区中考一模数学试题2023年吉林省松原市前郭尔罗斯蒙古族自治县松原市前郭县西部学区中考一模数学试题吉林省吉林市第七中学2022-2023学年九年级下学期学科检测数学试题(已下线)2023年吉林省一模(几何探究题)2022年湖北省黄冈市、孝感市、咸宁市中考数学真题(已下线)专题15 相似三角形-2022年中考数学真题分项汇编(全国通用)(第1期)(已下线)2022年湖北省黄冈市中考数学真题变式题21-24题河南省南阳市南召县城关镇第二初级中学2022-2023学年九年级上学期期末数学试题河南省南阳市南召县2022-2023学年九年级上学期期末数学试题2023年湖北省鄂州市梁子湖区涂家垴镇中学中考数学模拟试卷2023年江苏省徐州市铜山区中考一模数学试题(已下线)黄金卷08-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江苏徐州专用)(已下线)专题11 图形的相似-学易金卷:2023年中考数学一模试题分项汇编(江苏专用)2023年河南省商丘市夏邑县中考一模数学试题2023年甘肃省白银市会宁县中考一模数学试题 山西省临汾市侯马市2022-2023学年九年级上学期期末数学试题山西省晋城市阳城县2022-2023学年九年级上学期期末数学试题辽宁省鞍山市岫岩满族自治县2022-2023学年九年级下学期3月月考数学试题2021年广东省梅州市梅江区中考一模数学试题2021年广东省/东莞市石龙镇中考一模数学试题(已下线)2023年河南省一模(几何综合1)福建省泉州实验中学2023-2024学年九年级上学期第一次月考数学试题河南省鹤壁市浚县部分校2023-2024学年九年级上学期期中考前联考数学试题河南省新乡市原阳县2023-2024学年九年级上学期期中数学试题福建省惠安螺城中学2023-2024学年九年级上学期期中数学试题广东省佛山市顺德区2023-2024学年九年级上学期期末数学试题2023年河南省商丘市夏邑县普通高中招生第一次模拟考试数学模拟试题(已下线)重难点02 相似三角形模型及其综合题综合训练(11大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)宁夏回族自治区吴忠市青铜峡市2023-2024学年九年级下学期期中数学试题2024年广东省梅州市梅江区中考一模数学试题
10 . 【问题原型】数学老师给学生布置了下面这个问题:
如图①,在等边
中,点D为边
上任意一点,连接
,将线段
绕点D顺时针旋转60°,得到线段
,连接
.求证:
.
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986449803608064/2988501738143744/STEM/09e858e7-e494-4607-8f2e-3103c6b40f74.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986449803608064/2988501738143744/STEM/c1bf59d0-753f-47d5-b40b-2feea316303f.png?resizew=174)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986449803608064/2988501738143744/STEM/5871ff6e-9319-4f81-881b-a1bd669bfe77.png?resizew=351)
(1)【问题解决】小明的想法:连接
,利用三角形全等证明线段相等.
小亮的想法:在边
上取点F,使
,利用三角形全等证明线段相等.
在小明或小亮两人的方法中选择一种解决问题原型中的问题.
(2)【类比应用】如图②,在
中,
,
,点D为边
上任意一点,连接
,将线段
绕点D顺时针旋转90°,得到线段
,连接
.判断线段
和
的数量关系,并说明理由.
(3)【拓展延伸】如图③,在
中,
,
,点D为边
延长线上一点,连接
,将线段
绕点D顺时针旋转90°,得到线段
,连接
.当
时,直接写出
的值.
如图①,在等边
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986449803608064/2988501738143744/STEM/09e858e7-e494-4607-8f2e-3103c6b40f74.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986449803608064/2988501738143744/STEM/c1bf59d0-753f-47d5-b40b-2feea316303f.png?resizew=174)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986449803608064/2988501738143744/STEM/5871ff6e-9319-4f81-881b-a1bd669bfe77.png?resizew=351)
(1)【问题解决】小明的想法:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
小亮的想法:在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277733875645851ba19f488fc21415d.png)
在小明或小亮两人的方法中选择一种解决问题原型中的问题.
(2)【类比应用】如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(3)【拓展延伸】如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9228b213dc6b256b752b38a466ebec93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cdbbcd3b4fbd05cf6053ee61eca798.png)
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