1 . 如图,抛物线
与
轴相交于
,
两点(点
在点
的左侧),顶点为
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/6ce4a164-7947-4f70-b300-894e6cc866ff.png?resizew=195)
(1)直接写出点
的坐标______(用含
的式子表示);
(2)求点
的坐标;
(3)以
为边,在
边的右下方作正方形
,设点
的坐标为
.
①当
时,求点
的坐标;
②当
时,直接写出点
的坐标;
③直接写出
关于
的函数解析式及自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82159e4afd39848cd2b28ae5af1d915a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/6ce4a164-7947-4f70-b300-894e6cc866ff.png?resizew=195)
(1)直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64d924836b4292239d9726c6473d7f5.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c284ccb6f4ee7a8690013d2ce16e226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
③直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2 . 【感知】小明同学在学习相似三角形时遇到这样一个问题:
小明发现,过点
作
交
于
,可证明
,得到相关结论后,再利用相似三角形的性质即可得到问题的答案.下面是小明的部分证明过程:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/79e71c6d-1ae0-4a65-8b4d-89afb4be0e9b.png?resizew=536)
解:如图①,过点
作
交
于
,则
,
,
∵
是
的中点,
∴
,
∴
,
∴
,
∴
,
∵
是
的一个三等分点,且
,
∴
,
∴
,
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1b0358987a2bf628d25df3c280150.png)
请你补全余下的证明过程.
【尝试应用】
如图②,在
中,
为
上一点,
,连结
,若
,交
、
于点
、
.若
,
,
,则
的长为______.
【拓展提高】
如图③,在平行四边形
中,点
为
的中点,点
为
上一点,
与
、
分别交于点
、
,若
,则
的值为______.
如图,在![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9e49c1a0bb7db8b808b805d08c499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f36c4d133da7a2b7f6665a46fd325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1b0358987a2bf628d25df3c280150.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/79e71c6d-1ae0-4a65-8b4d-89afb4be0e9b.png?resizew=536)
解:如图①,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb9e49c1a0bb7db8b808b805d08c499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0f36c4d133da7a2b7f6665a46fd325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f773ee1d4280f9ef5278c6738c92ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f317a9a9b7d95f827593f72b223d26.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70e9557de903cfe3d095cb821abcff6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78eb5b388afc0437ec7805c5608ebe7.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ac6111180757359050b6af741d12dc.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa61d9f35c4160f319e77be88c7f033.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc63ac949336bc7f62634f359a8593c9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0c0e406072a645180d49c3295c73c0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f1b0358987a2bf628d25df3c280150.png)
请你补全余下的证明过程.
【尝试应用】
如图②,在
![](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/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21d8e7af78693e5da7957c8034e8bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
【拓展提高】
如图③,在平行四边形
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14cbce0fef923b14f40d18c0c15ef23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96690c112163231c015adebd5f138380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064f3aa6e912fd41811bee2bf9ea1aba.png)
您最近一年使用:0次
3 . 在
中,
,直线l过点A,且
.
与
关于直线l对称,点B的对称点是点D,
与
的三边围成的图形记作图形“M”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/46409c84-d98f-403b-8dba-cb99ca9302ef.png?resizew=509)
(1)如图①,若
,则
的度数为_______;
(2)如图②,点P在直线l上,且
,过点P作
,垂足为点F.求证:
;
(3)若
,将直线l沿着
方向向右平移1个单位长度,与
、
分别交于点F、G.点H在
上方的直线l上,且
.动点P从点H出发以每秒2个单位长度的速度沿射线
向下匀速运动,运动时间为
,点P关于直线
的对称点为点
.
①如图③,若点
恰好在边
上,连接
,则线段
的长度为______,
______s;
②当点
落在图形“M”的内部(不包括边界)时,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95e692badf11ca5ac25104a166f4467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/46409c84-d98f-403b-8dba-cb99ca9302ef.png?resizew=509)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219f604632bd927bce98fd7ed35f040b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
(2)如图②,点P在直线l上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc61de08bda0c44e06ad89d306c0bb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80406e8beb743b122bd7b021671c780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdc6cf8241893d53c6906d4ce315629.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd108abaf2b7fc1d0239b28afcf4ae6c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05529d5906c6873231d138127bc9e2d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ef1743637e80b45af9562930f226a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
①如图③,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2a2bd5c26ae3a09fe885705128cac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2a2bd5c26ae3a09fe885705128cac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
您最近一年使用:0次
4 . 如图,
是等腰直角三角形,
,
,
于点
.点
为边
上一动点,连接
,作
,使点
在射线
上,过点
作
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/63f84d73-567c-4b3a-9819-da7bb9d14833.png?resizew=200)
(1)
的长为 ;
(2)当点
在线段
上时,求证:
;
(3)若
将
分成面积比为
的两部分,求
的长;
(4)若
的一个内角为
,直接写出
的大小.
![](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/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2a886b175c450e1bd2897df4812499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa65b4232baf979eb3658e19bf56a19d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/63f84d73-567c-4b3a-9819-da7bb9d14833.png?resizew=200)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)当点
![](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/d3a423b03cc2bae3d53343231b41f984.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5881f1ce9b4172ca346032d0fd1e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d9f2bee4f93e23c07e0aaeecf02f43.png)
您最近一年使用:0次
5 . 综合与探究
问题情境:数学课上,老师引导同学们以“正方形中线段的旋转”为主题开展数学活动.已知正方形
中,
,点E是射线
上一点(不与点C重合),连接
,将
绕点E顺时针旋转
得到
,连接
.
特例分析:(1)如图1,当点E与点D重合时,求
的度数;
深入谈及:(2)当点E不与点D重合时,(1)中的结论是否仍然成立?若成立,请在图2与图3中选择一种情况进行证明;若不成立,请说明理由;
问题解决:(3)如图4,当点E在线段
上,且
时,请直接写出线段
的长.
问题情境:数学课上,老师引导同学们以“正方形中线段的旋转”为主题开展数学活动.已知正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
特例分析:(1)如图1,当点E与点D重合时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7316430d26a6f4bcc0bdadfd1a5330a.png)
深入谈及:(2)当点E不与点D重合时,(1)中的结论是否仍然成立?若成立,请在图2与图3中选择一种情况进行证明;若不成立,请说明理由;
问题解决:(3)如图4,当点E在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa8a9b14da8a472a8855449f1160b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/d0117d7b-d715-406c-8e7f-de1a4e5ab396.png?resizew=466)
您最近一年使用:0次
2023-11-14更新
|
171次组卷
|
2卷引用:吉林省松原市宁江区吉林油田第十二中学2023-2024学年九年级上学期期末数学试题
6 . 如图,矩形
中,
,
,P为
边中点,
,
绕点P旋转,其中点E,F在矩形
的边上.在旋转过程中,请探究:
(1)矩形
的边落在
内部的线段长的和是否发生变化?为什么?
(2)矩形
与
重叠部分的面积是否发生变化?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fd792376c623d8299f554b46486f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/9/63bf2812-71c1-47a7-b914-894d99407e68.png?resizew=367)
(1)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
(2)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
您最近一年使用:0次
2023-09-08更新
|
49次组卷
|
2卷引用:吉林省四平市双辽市2023-2024学年九年级上学期期末数学试题
名校
7 . 如图,在
中,已知
,
,
的面积等于10.
是边
上的一个动点(不与点
重合),连接
,将点
绕点
顺时针旋转
得到点
,连接
、
、
、
.
(1)当点
落在边
上时,线段
的长为______;
(2)当
时,求
的面积;
(3)当点
共线时,求线段
的长;
(4)当
为直角三角形时,直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e530783dc49238736ed5c1157e6184dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be451ce5fad246389ccf4864929d81d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ba89e83329983cfadbfcdda151aaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/2f10754a-b677-48ca-8e1e-cd11fd44af59.png?resizew=156)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2c20ac78350400cdcd7588bebb0adc.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/121a5f4f24b1737399400daa7de9c66b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f62304c6802a1e10d9425b8b6e025c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
8 . 如图,在平面直角坐标系中,点A在x轴上,点B在y轴上,点C在AB的延长线上.过点C作
,与y轴交于点D,且
.若点D的坐标为
,则线段AC的长度为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfa14df2e34162f35f421f2ae598cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/970cff8f26c009cc869e63e44334bd2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f2be8f1e796226f1b0fa95f6aea35d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/e30de17a-b747-41a9-be1c-7928e424ba63.png?resizew=100)
您最近一年使用:0次
2023-03-11更新
|
120次组卷
|
4卷引用:吉林省延边朝鲜族自治州2022-2023学年八年级上学期期末数学试题
吉林省延边朝鲜族自治州2022-2023学年八年级上学期期末数学试题吉林省延边州2022-2023学年八年级上学期期末数学试题吉林省松原市乾安县2023-2024学年 八年级上学期数学期末试题(已下线)期中复习与测试(1)(第11-13章)-2023-2024学年八年级数学上册基础知识专项突破讲与练(人教版)
9 . 在四边形
中,对角线
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/1f4fd6a9-92f9-4d39-8650-2ec0166790e4.png?resizew=334)
【感知】如图①,当
时,利用全等知识求证:
.
【探究】如图②,当
时,求
.
【应用】如图③,当
,
,
,
于点
,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/1f4fd6a9-92f9-4d39-8650-2ec0166790e4.png?resizew=334)
【感知】如图①,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009aa13093cc3865dcd51b371892160.png)
【探究】如图②,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be46af71e864e81dac773b9a2dd2a40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c0e79ff076d520b4d7a66ce8db06b3.png)
【应用】如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173904239da66b7bef7cb1d997cc40ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d04e925500528dc7f3680a66072e35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76c404ec77f33e74d30f4d9f829cefb.png)
您最近一年使用:0次
10 . 如图,在平面直角坐标系中,二次函数
的图象与
轴相交于点
,
,与
轴相交于点
.若二次函数
的图象经过点
,
.
(2)当
时,求二次函数
最大值与最小值的差;
(3)在二次函数
图象上任取一点
,其横坐标为
.点
在二次函数图象的对称轴上.若以点
,
,
为顶点三角形是以
为直角的等腰三角形.求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd1a5612d7ae2b99265e6527c9ae78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd92d7c87aaa950ce4d4b26578ae2221.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b6fd5a1dbb65cbe9bfe602c914a24f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
(3)在二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030314ca026d6b18481682f70f48d19b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
2022-12-27更新
|
161次组卷
|
4卷引用:吉林省吉林市丰满区第二十九中学校2022-2023学年九年级上学期期末数学试题