1 . 如图
,在四边形
中,
,
,顶点
,
分别在射线
,
上运动(点
不与
重合,点
不与
重合),
是
边上的动点(点
不与
,
重合),在运动过程中始终保持
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/75ae9681-53f0-494c-ba88-3b37686e95d9.png?resizew=268)
(1)求证:
∽
;
(2)当点
为
边的中点时(如图2),求证:
平分
;
(3)若
,设
,请探究:
的周长是否与
的值有关?若有关请用含
的代数式表示
的周长;若无关请说明理由,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41aba1711910c6f533cc94319104f4fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/2a30f3a8b673cc28bd90c50cf1a35281.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/878a63a7899c8226744748a0102eab95.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/75ae9681-53f0-494c-ba88-3b37686e95d9.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c9a77f3dcaacefe3ee0a64ddf7f73a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdee944358dbb99d893228c387a00c43.png)
(2)当点
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4b36b4cecb03eb8a31cd0775be1483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcb0816ee2da7ddd071156a900f9eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdee944358dbb99d893228c387a00c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdee944358dbb99d893228c387a00c43.png)
您最近一年使用:0次
名校
2 . 定义:两个相似等腰三角形,如果它们的底角有一个公共的顶点,那么把这两个三角形称为“关联等腰三角形”、如图,在
与
中,
,且
.所以称
与
为“关联等腰三角形”,设它们的顶角为a,连接
,则称
为“关联比”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/aed55e37-00ac-459e-b67c-ea53530af3c2.png?resizew=121)
下面是小颖探究“关联比”与a之间的关系的思维过程,请阅读后,解答下列问题:
(1)当
与
为“关联等腰三角形”,且
时,
①在图1中,若点E落在
上,则“关联比”
____________;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/fae5bcb0-714a-4363-87ba-f9530187f2aa.png?resizew=111)
②在图2中,探究
与
的关系,并求出“关联比”
值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/fc5bae17-61fe-421e-8f47-edaf45c7c0e6.png?resizew=136)
(2)如图3,当
与
为“关联等腰三角形”,且
时,“关联比”
=______________;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/9060d882-59fc-4ee5-826d-436f30517c0f.png?resizew=150)
[迁移运用]
(3)如图4,
与
为“关联等腰三角形”.若
,
,点P为
边上一点,且
,点E为
上一动点,求点E自点B运动至点P时,点D所经过的路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a64cf634f51811e6bee01dd6f1010ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c30583f2a4aca915134f41b452e4e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8486294bdbad1f941f44474c5e42a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0a2b2b481d31e5e9d6cc93d9aa3fa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/aed55e37-00ac-459e-b67c-ea53530af3c2.png?resizew=121)
下面是小颖探究“关联比”与a之间的关系的思维过程,请阅读后,解答下列问题:
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
①在图1中,若点E落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b250bf0958b11bbee1c88f7f83952b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/fae5bcb0-714a-4363-87ba-f9530187f2aa.png?resizew=111)
②在图2中,探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0a2b2b481d31e5e9d6cc93d9aa3fa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/fc5bae17-61fe-421e-8f47-edaf45c7c0e6.png?resizew=136)
(2)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0a2b2b481d31e5e9d6cc93d9aa3fa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/9060d882-59fc-4ee5-826d-436f30517c0f.png?resizew=150)
[迁移运用]
(3)如图4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/766ae8acaddb28f8a5a55eff086fd976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/5ce7fa88-ff34-4b59-94b2-a25e5e5e8036.png?resizew=166)
您最近一年使用:0次
2022-11-20更新
|
294次组卷
|
5卷引用:湖南省长沙麓山外国语实验中学2022-2023学年九年级上学期第三次月考数学试卷
湖南省长沙麓山外国语实验中学2022-2023学年九年级上学期第三次月考数学试卷山东省青岛市市南区青岛第七中学2022-2023学年九年级上学期期中数学试题山东省青岛市即墨区2022-2023学年九年级上学期期中数学试题山东省青岛第二十六中学、第二十七中学2022-2023学年九年级上学期期中数学试题(已下线)山东省济南市高新区2022-2023学年九年级上学期期末数学试题变式题21-26
3 . 综合与实践
如图1,在直角三角形纸片
中,
,
,
.
【数学活动】
将三角形纸片
进行以下操作:第一步:折叠三角形纸片
使点
与点
重合,然后展开铺平,得到折痕
;第二步:将
沿折痕
展开,然后将
绕点
逆时针方向旋转得到
,点
,
的对应点分别是点
,
,直线
与边
所在直线交于点
(点
不与点
重合),与边
所在直线交于点
.
(1)折痕
的长为______;
(2)
绕点
旋转至图1的位置时,试判断
与
的数量关系,并证明你的结论;
【数学探究】
(3)
绕点
旋转至图2、图3所示位置时,探究下列问题:
①如图2,当直线
经过点
时,
的长为______;
②如图3,当直线
时,
的长为______;
【问题延伸】
(4)在
绕点
旋转的过程中,连接
,则
的取值范围是______.
如图1,在直角三角形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
【数学活动】
将三角形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029ad83f1a3262048cba0e650b63e929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)折痕
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
【数学探究】
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
①如图2,当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
②如图3,当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95a2a2d3ead86a287255a428997c399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
【问题延伸】
(4)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
2023-05-25更新
|
298次组卷
|
7卷引用:湖南省永州市新田县云梯学校2022-2023学年九年级下学期期中数学试题
4 . (1)【问题情境】如图①,在矩形
中,点E、F分别在边
上,且
于点G,求证:
;
(2)【变式思考】如图②,在(1)的条件下,连接
,若
,求证:点E是
的中点;
(3)【深入探究】如图③,在矩形
中,点E、F、H分别在边
上,且
于点G,连接
,设
,且
,若
,求
的值(用含m的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fdc2492e48a8cd83390da3546ce929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15df8d39f3aa60f54a098ab897bfb5d.png)
(2)【变式思考】如图②,在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77b6e2a527a14809aa4b196633ea74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(3)【深入探究】如图③,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470b7f5dc8f2a8b589b024f631cbcdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bde8f23d55bb467033383eaa5042de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f63c85381d5be5a0f3c7120b542aca7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a8160bfd7a8813797ee46ee49be69c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/610f24283de2d864ccd9b0d5ad923238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ce958cacd3dbda43859f992b18c76f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/a73d655d-8a95-4e98-b200-2d1e7dcae6e5.png?resizew=586)
您最近一年使用:0次
5 . 如图1,
中,
,
于点H,点D在
上,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/5c177d9c-7957-4b0f-95e0-dfcc0a71ff6c.png?resizew=418)
(1)求证:
;
(2)将
绕点H旋转,得到
(点B,D分别与点E,F对应),连接
.
①如图2,当点F落在
上时(F不与C重合),若
,
,求
的长;
②如图3,当
是由
绕点H逆时针旋转
得到时,设射线
与
相交于点G,连接
,试探究线段
与
之间满足的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701e06c87bb438d85ab1de43cae9ccc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/5c177d9c-7957-4b0f-95e0-dfcc0a71ff6c.png?resizew=418)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01476dfb5970e27f54f742c27b9515f9.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a40032e6e70341ca7139d9c97c2a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd35bd406de97d29594aff377b213fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
①如图2,当点F落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c0490a98008b88a5312bfbdd87d7fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
②如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd35bd406de97d29594aff377b213fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a40032e6e70341ca7139d9c97c2a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
6 . 某校数学活动小组探究了如下数学问题:
(1)问题发现:如图1,
中,
,
.点
是底边
上一点,连接
,以
为腰作等腰
,且
,连接
、则
和
的数量关系是___________;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/b41802be-d86a-4783-8062-30394e828810.png?resizew=176)
(2)变式探究:如图2,
中,
,
.点
是腰
上一点,连接
,以
为底边作等腰
,连接
,判断
和
的数量关系,并说明理由;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/7358e79f-a5f6-4cb9-8e80-023749b9994a.png?resizew=149)
(3)问题解决;如图3,正方形
的边长为10,点
是边
上一点,以
为对角线作正方形
,连接
.若设正方形
的面积为
,
.求
与
的函数关系式.
(1)问题发现:如图1,
![](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/047dc9795efa99b6fb9fdf9778085dab.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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f767e7ff79a0fbfcf97244fd95bb9f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521002bec94a87a6699f17fbb9403fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/b41802be-d86a-4783-8062-30394e828810.png?resizew=176)
(2)变式探究:如图2,
![](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/047dc9795efa99b6fb9fdf9778085dab.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/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1696e012bff2ca41efe7e82bff6a3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/7358e79f-a5f6-4cb9-8e80-023749b9994a.png?resizew=149)
(3)问题解决;如图3,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d0a84fe728fdf9a44a15316499edab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d0a84fe728fdf9a44a15316499edab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5ad6368dd902909c197eb60c52176e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/20/e55e82bd-921a-4687-b537-3cd8f9922f96.png?resizew=158)
您最近一年使用:0次
2023-04-12更新
|
192次组卷
|
4卷引用:湖南省衡阳市船山实验中学2023-2024学年九年级上学期期末数学试题
2023·湖南长沙·一模
7 . 如图1,在
中,
为直径,点C在圆上,
,
,D是
上一动点(与点A、B不重合),
平分
交边
于点E,
,垂足为点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/2b195591-e34d-4a4d-8ead-9b30a8c28aee.png?resizew=507)
(1)当点D与圆心O重合时,如图2所示,则
;
(2)若
,试探究
与
有何面积关系,并证明;
(3)当
与
相似时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3deb2a0eb07ff8ad46005132c863cde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee57c3d1bfcca8feb7122421039cfc7.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/c9d16fab0f52c8af5abba0bf19a06ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/2b195591-e34d-4a4d-8ead-9b30a8c28aee.png?resizew=507)
(1)当点D与圆心O重合时,如图2所示,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4411d9b3f56d8bbc769baff1ca406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23cc6a0d2f0c5166fd2c9868a85b50ef.png)
您最近一年使用:0次
2023-03-31更新
|
307次组卷
|
5卷引用:2023年湖南省长沙市长郡教育集团中考数学一模试卷
(已下线)2023年湖南省长沙市长郡教育集团中考数学一模试卷 2023年广东省广州市增城区香江中学中考一模数学试卷2023年广东省汕头市金平区碧华学校中考一模数学试题(已下线)2023年佛山等市一模(几何综合2)(已下线)2023年广州等市一模(几何综合)
名校
8 . 如图1,
中,
,
的大小保持不变,点
在斜边
上,
,垂足为点
.如图2,把
绕着点
顺时针旋转,旋转角为
,点
的对应点为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/84bed381-cb9f-4dcb-94fa-b229df9d2535.png?resizew=322)
(1)求作点
的对应点
(要求尺规作图,不写作法,保留作图痕迹);
(2)连接
,
,
,直线
,
相交于点
,试探究在整个旋转过程中,直线
,
所相交成的锐角是否保持不变?若不变,请证明:若有变化,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1aa7bc4a01962fc1297f17fa9128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/84bed381-cb9f-4dcb-94fa-b229df9d2535.png?resizew=322)
(1)求作点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
您最近一年使用:0次
2023-03-31更新
|
502次组卷
|
6卷引用:2023年湖南省娄底市双江学校中考一模数学试卷
2023年湖南省娄底市双江学校中考一模数学试卷2023年福建省厦门市第六中学九年级下学期直升模拟数学试题2023年福建省福州市时代华威中学中考二检数学试题(已下线)专题16 作图与图形变换-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(全国通用)(已下线)2023年山西省中考数学真题变式题19-21题(已下线)专题4.46 相似三角形几何模型(旋转模型)(培优练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)
9 . 如图,在矩形
中,点P是边上任意一点(点P不与B、C重合),连接
,作
,交
于点Q,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/68e90194-4948-41f6-ae57-4f75984aebe5.png?resizew=136)
(1)试证明:
;
(2)当
为多少时,
最长,最长是多少?
(3)试探究,是否存在一点P,使
是等腰直角三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287eb7b9d7d5b93b81550f9c9d54a9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b4da8d254b7d76b7615d7f7cd824a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/68e90194-4948-41f6-ae57-4f75984aebe5.png?resizew=136)
(1)试证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96897f11c3d6e435f8603168908cbddb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
(3)试探究,是否存在一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
您最近一年使用:0次
2023-03-29更新
|
100次组卷
|
2卷引用:2023年湖南省衡阳市衡山实验中学中考数学一模试卷
10 . 已知:如图1,二次函数
的图像交x轴于A,B两点(A在B的左侧),过点A的直线
交该二次函数的图像于另一点
,交y轴于M.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/af1bdfca-30b6-4c2a-a549-13f843208230.png?resizew=327)
(1)直接写出A点坐标,并求该二次函数的解析式;
(2)过点B作
交
于D,若
且点Q是线段
上的一个动点,求出当
与
相似时点Q的坐标:
(3)设
,图2中连接
交二次函数的图像于另一点
,连接
交y轴于N,请你探究
的值的变化情况,若变化,求其变化范围;若不变,求其值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77aadf6f84f7916a5ad76b3dad721d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f6525064656e455b2b95f2a076577c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234966ff2e285995cfff106ffd608862.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/af1bdfca-30b6-4c2a-a549-13f843208230.png?resizew=327)
(1)直接写出A点坐标,并求该二次函数的解析式;
(2)过点B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c605c718f7061f6cab2376c882f5972f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c3c30c66aa94afb935664dbe76501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323eb2e41f461ac655012a986d5a27bb.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e94852797399ba119b090fa957ee3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c303bc977fff16da7e3cac14d5a606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04597cadc0f1f5035a4dca9ab70d1e08.png)
您最近一年使用:0次