如图,矩形
中,
,
,
,
分别为
上两个动点,连接
,将矩形沿
折叠,点
,
的对应点分别为
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/6737e77f-6d6a-4d12-bda6-05d32c336009.png?resizew=273)
(1)如图
,当点
落在
边上时,连接
.
①求
的值;
②若点
为
的中点,求
的长.
(2)如图
,若
为
的中点,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/6737e77f-6d6a-4d12-bda6-05d32c336009.png?resizew=273)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04474a6bb2846802ebec6d0d24f473e.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/35c0e438f7a3e43e5526d3b78006f684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03dcd8b498f8b3a5141fbcc41cfed795.png)
22-23九年级上·广西贵港·期末 查看更多[2]
更新时间:2024-01-08 15:18:04
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相似题推荐
解答题-问答题
|
适中
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【推荐1】如图,在
中,AB=BC,∠CBA=60°,点E是BC上的一点,连接AE,将EA绕点E顺时针旋转90°得到ED,点D恰好在AC的延长线上,若CE=2,求AC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/7/6/3016899345260544/3026525117022208/STEM/53f4891267ef4250a91025f5198553f3.png?resizew=141)
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【推荐2】如图,抛物线
经过
,与
轴交于点
,过点
作
轴,交抛物线于点
,连接
、
,
交
轴于点
,且
.
(2)点
为抛物线对称轴上一点,且位于
轴上方,连接
、
,若
是以
为直角边的直角三角形,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70c93718be1e6197b7783d62c963ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25cf65bc10d1b37dd42a04eecd157d73.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-证明题
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适中
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【推荐1】课本再现
(1)如图1,
与
相交于点
是等腰直角三角形,
,若
,求证:
是等腰直角三角形.
类比探究
(2)①如图2,
是等腰直角
的斜边,G为边
的中点,E是
的延长线上一动点,过点E分别作
与
的垂线,垂足分别为
,顺次连接
,得到
,求证:
是等腰直角三角形.
②如图3,当点E在边
上,且①中其他条件不变时,
是等腰直角三角形是否成立?_______(填“是”或“否”).
拓展应用
(3)如图4,在四边形
中,
平分
,当
时,求线段
的长.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eca11c97ac059b6e640b84fb3e4321e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
类比探究
(2)①如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec38bedb55b02c42c1fb552e6cbf7a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6195345028e330cf9a9349db7796b246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40277f2c88dc0b716383fc785df8ab7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40277f2c88dc0b716383fc785df8ab7c.png)
②如图3,当点E在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40277f2c88dc0b716383fc785df8ab7c.png)
拓展应用
(3)如图4,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7408dc5e44bc8f51fd96ce52899b119c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b6508826088ce4d25d20d03ef0d414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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真题
名校
【推荐2】操作发现
将一副直角三角板如图①摆放,能够发现等腰直角三角板ABC的斜边与含30°角的直角三角板DEF的长直角边DE重合.
问题解决
将图①中的等腰直角三角板ABC绕点B顺时针旋转30°,点C落在BF上,AC与BD交于点O,连接CD,如图②.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/cb2d8b9a-29de-4d3f-b1d8-a637be0da961.png?resizew=321)
(1)求证:△CDO是等腰三角形;
(2)若DF=8,求AD的长.
将一副直角三角板如图①摆放,能够发现等腰直角三角板ABC的斜边与含30°角的直角三角板DEF的长直角边DE重合.
问题解决
将图①中的等腰直角三角板ABC绕点B顺时针旋转30°,点C落在BF上,AC与BD交于点O,连接CD,如图②.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/cb2d8b9a-29de-4d3f-b1d8-a637be0da961.png?resizew=321)
(1)求证:△CDO是等腰三角形;
(2)若DF=8,求AD的长.
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解答题-问答题
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【推荐1】如图,矩形DEFG的边EF在△ABC的边BC上,顶点D、G分别在边AB、AC上,已知△ABC的边BC长60厘米,高AH为40厘米,矩形DEFG相邻两边DE:EF=2:3.求矩形DEPO的边DE、EF的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/080edc8e-e5bb-4a09-b63a-862da2893ab7.png?resizew=176)
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解答题-证明题
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适中
(0.65)
【推荐2】 如图所示,
为
的直径, 弦
于点 E, 连接
, 过点C作
交
于点G, 点 F 在
的延长线上, 连接
, 已知. ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823fcfeb826012b72986a93207a471ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/23/c8f9f78b-452a-42f0-9740-d654f95dd8f8.png?resizew=158)
(1)求证:
是
的切线;
(2)若
求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7833e1f53e2d35a85b07b834cbd17306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c74fba72fc783d7ebdd2dff9ae44634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823fcfeb826012b72986a93207a471ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/23/c8f9f78b-452a-42f0-9740-d654f95dd8f8.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350983a3535e4050c4415c6ffcdc467a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/93787d0d-32b6-4eb9-84a7-9a04e35ec608.png?resizew=197)
(1)在
边上求作点
,连结
,使得
;(要求:尺规作图,不写作法,保留作图痕迹)
(2)在(1)所作的图形中,当
,
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/93787d0d-32b6-4eb9-84a7-9a04e35ec608.png?resizew=197)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
(2)在(1)所作的图形中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101bb72104105c615f95d7aede1a9c29.png)
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真题
【推荐2】如图,点P在
的直径BA的延长线上,AB=2PA,PC切
于点C,连结BC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/39fcdd6d-790e-446c-9064-27c63bbc0a22.png?resizew=249)
(1)求
的正弦值;
(2)若
的半径r=2cm,求BC的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/39fcdd6d-790e-446c-9064-27c63bbc0a22.png?resizew=249)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ee67544946c4681af6930efd2f04fb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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