定义1:如图1,把平面内一条数轴
绕原点
逆时针旋转![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
得到另一条数轴
,
轴和
轴构成一个平面斜坐标系.规定:过点
作
轴的平行线,交
轴于点
,过点
作
轴的平行线,交
轴于点
,若点
在
轴上对应的实数为
,点
在
轴上对应的实数为
,则称有序实数对
为点
的斜坐标,实数
为点
的横坐标.
定义2:在平面斜坐标系
中,若
与
有且只有两个公共点,其中一个公共点为点
,另一个公共点在边
上(不与点
重合),则称
为
的“点
关联三角形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/26a31f10-bfae-4f85-b1b3-2702864ee2df.png?resizew=389)
(1)已知
的半径为
,
为
的“点
关联三角形”.
①如图2,点
,
,点
的横坐标的最小值为 ,在
,
这两个点中,点
可以与点 重合;
②若点
,点
,
,
,
,点
在
轴下方.求满足条件的点
轨迹长度;
(2)已知
的半径为
,点
,点
.若平面斜坐标系
中存在点
,使得
是等边三角形,且
为
的“点
关联三角形”,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf1462447358f707b7a4486f54d4d719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
定义2:在平面斜坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0520e9675bc1b416e8b8f01eb69fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/2/26a31f10-bfae-4f85-b1b3-2702864ee2df.png?resizew=389)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
①如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87baa7770b063bfe7cd8f8fce57d9181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62dfe60e2f098c466a048b982151365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7471b43468522805db8b715ca960a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2555986108fe0a6c73d5dbf111449e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038859f0522418265bc7cd9b2f9ed64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6e4a2df58a236c20df5df0d29a466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4ed468bcb311979a392c776ee12e0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d03310fa9440053c57d878acc06d02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
更新时间:2023-12-10 21:03:21
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】
和
都是等腰三角形,
,直线
,
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/0f4159be-9858-4bd8-b507-88065fb41e9a.png?resizew=439)
如图1,
,
,
在一条直线上,当
时,填空:
的值是_________,
_________
.
(2)类比探究
如图2,当
时,探究
的值(用含m的式子表示)及
的度数(用含
的式子表示),并就图2的情形写出探究过程.
(3)拓展运用
如图3,当
时;若点
,
,
在一条直线上,延长
与边
,
分别交于点
,
,且
是
的中点,
,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe5b1fe022253c9bfe13be630484f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/0f4159be-9858-4bd8-b507-88065fb41e9a.png?resizew=439)
图1 图2 图3
(1)特例发现如图1,
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274ae3f70122c99addb6df12405bac91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2979f64c85f82d8975d73ee1c342de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)类比探究
如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e7930731eddbcfac592b808e9b698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274ae3f70122c99addb6df12405bac91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)拓展运用
如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7582de4cb5635313aa2dc79f8ca8deac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】在锐角
中,
,
,
,将
绕点
按逆时针方向旋转,得到
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/d9367a9e-53ca-4d6c-a968-abe3c8abd64e.png?resizew=496)
(1)当点
在线段
的延长线上时,如图1,求
的度数;
(2)如图2,
绕点
按逆时针方向旋转,连接
,
,若
的面积为
,求
的长度;
(3)如图3,点
为线段
中点,点
是线段
上的动点,在
绕点
按逆时针方向旋转过程点
的对应点是点
,求线段
长度的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7988923407b9abb78ef8ab45829678fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/d9367a9e-53ca-4d6c-a968-abe3c8abd64e.png?resizew=496)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c755fafffc2de8869c5706e344ea394a.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3c5f5006941a576a60a9a0a8a40f3f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a554e03744b5befe9e0939377dafa8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
(3)如图3,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/dad2a36927223bd70f426ba06aea4b45.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e44f0ea0302c32144018b1185e4ce0.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,
为等边三角形,D为AC右侧一点,且
,连接BD交AC于点E,延长DA、CB交于点F.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947478415712256/2949500209004544/STEM/fb691228-0624-41fd-a16e-42acea4c0179.png?resizew=391)
(1)若
,
,求AD;
(2)证明:
;
(3)如图2,若
,G为BC中点,连接AG,M为AG上一动点,连接CM,将CM绕着M点逆时针旋转90°到MN,连接AN,CN,当AN最小时,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947478415712256/2949500209004544/STEM/fb691228-0624-41fd-a16e-42acea4c0179.png?resizew=391)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f80a9b3e17fca568e05477eaf317a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f414cce1427646590a7f7144efe2e26.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f79d2ad4c864f3b9ec14f99063da87.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
您最近一年使用:0次
【推荐2】如图,在△ABC中,AB=AC,D为直线BC上一动点(不与点B,C重合),在AD的右侧作△ADE,使得AE=AD,∠DAE=∠BAC,连接CE.
![](https://img.xkw.com/dksih/QBM/2021/12/22/2878026876739584/2879420079374336/STEM/17c17ce5-b24a-40f9-93e5-9c182744a1c1.png?resizew=150)
(1)当D在线段BC上时,
①求证:△BAD≌△CAE;
②若AC⊥DE,求证:BD=DC;
(2)当CE∥AB时,若△ABD中最小角为20°,试探究∠ADB的度数(直接写出结果)
![](https://img.xkw.com/dksih/QBM/2021/12/22/2878026876739584/2879420079374336/STEM/17c17ce5-b24a-40f9-93e5-9c182744a1c1.png?resizew=150)
(1)当D在线段BC上时,
①求证:△BAD≌△CAE;
②若AC⊥DE,求证:BD=DC;
(2)当CE∥AB时,若△ABD中最小角为20°,试探究∠ADB的度数(直接写出结果)
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【推荐3】如图,在等腰三角形
中,
,点
是底边
上任意一点
不与
、
重合
,过点
作
,
,垂足为
、
,由等面积法可知
,即
,从而可得:
.即:等腰三角形底边上任意一点到两腰的距离和,等于腰上的高.
(1)如图1,在矩形
中,
,
,
是
上不与
和
重合的一个动点,过点
分别作
、
的垂线,垂足分别为
、
.求
的值;
(2)如图
,在矩形
中,点
、
分别在边
、
上,将矩形
沿直线
折叠,使点
恰好与点
重合,点
落在点
处.点
为线段
上一动点
不与点
,
重合
,过点
分别作直线
、
的垂线,垂足分别为
、
,以
、
为邻边作平行四边形
,若
,
,求平行四边形
的周长;
(3)如图3,当点
是等边
外一点时,过点
分别作直线
、
、
的垂线,垂足分别为点
、
、
.若
,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.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/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ededa0e19291b5b7eb9884af5bdeb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9887e1ff61308713287d592c8e8d942.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/08d506b6f491772cc2819f680acb4cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f732e985b048732ca36d9bd9fe50476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/327b92c1ec8db604ce0316c8e6492b05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/4/5ab595c8-be0c-4f86-ae23-22046f394191.png?resizew=134)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/4/bfa38b42-5f0d-427d-bb5d-30f9c3f56ba3.png?resizew=448)
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e2a96ad10f818c9a5ad7ef46a304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac943d8c2eb91c0082ada87857d1ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.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/9292a1dc93f6a4ac6966d7ce9f9f2b33.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.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/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0e65e147b109f2bbfd3a3f502bbc3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/1a3137705cb4170baafa66ff46eefb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d09859dfab140e55e3cc3e7d67d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8a5549b1bed3b24753d97a5b84a49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d1ea6697ecb335b3f449b16830736f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fdf1628f44d1ce04775d135eb99734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8a5549b1bed3b24753d97a5b84a49c.png)
(3)如图3,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86163e76653de1f383788b741fb64a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1fae01485740cbb48b5c79f1185b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301a6928b2b289ace1e9e5c8420610ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be51d6b50bd3dcabe483971c4a366bca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图,抛物线
与x轴交于A、B(A在B左侧)两点, 一次函数y=-x+4与坐标轴分别交于点C、D,与抛物线交于点M、N,其中点M的横坐标是
.
(1)求出点C、D的坐标;
(2)求抛物线的表达式以及点A、B的坐标;
(3)在平面内存在动点P(P不与A,B重合),满足∠APB为直角,动点P到直线CD的距离是否有最小值,如果有,请直接写出这个最小值的结果;如果没有,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212d9ca9e187e41c3a39870df759d908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(1)求出点C、D的坐标;
(2)求抛物线的表达式以及点A、B的坐标;
(3)在平面内存在动点P(P不与A,B重合),满足∠APB为直角,动点P到直线CD的距离是否有最小值,如果有,请直接写出这个最小值的结果;如果没有,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/3ebeb873-f170-4ba4-bcbe-4c3f4d5c075b.png?resizew=136)
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【推荐2】对于平面内的点P和图形M,给出如下定义:以点P为圆心,r为半径作圆.若
与图形M有交点,且半径r存在最大值与最小值,则将半径r的最大值与最小值的差称为点P视角下图形M的“宽度
”.
,
.
①在点O视角下,线段
的“宽度
”为______;
②若
半径为2,在点A视角下,
的“宽度
”为______;
(2)如图2,
半径为2.点P为直线
上一点.求点P视角下
“宽度
”的取值范围;
(3)已知点
,
,直线
与x轴,y轴分别交于点D,E.若随着点C位置的变化,使得在所有点K的视角下,线段
的“宽度”均满足
,请直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4f1441a47a4c3c913b5fbb06fdd283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f774f8a340c533ee29a03f31fb85f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549f5e607ed8f8812cd9d40b693074fe.png)
①在点O视角下,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ebfda261c4a27e1fa2ee5fc6d4bdfb.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f6558fef858bf27e9811c2d9426fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40894e9f6d6db9b55885e99b7ba01c7d.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f7a150edb3b704afac38f2951c79b4.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a56dd9a35c06b3ee334e83602fefc82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13c5213c1c47f9574435bfaaacb2c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068a52202cf56a4aeaf55902a95d83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34071aa42aa1c7716f6b3256a42482e.png)
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【推荐3】已知:如图,在Rt△ABO中,∠B=90°,∠OAB=30°,OA=3.以点O为原点,斜边OA所在直线为x轴,建立平面直角坐标系,以点P(4,0)为圆心,PA长为半径画圆,⊙P与x轴的另一交点为N,点M在⊙P上,且满足∠MPN=60°.⊙P以每秒1个单位长度的速度沿x轴向左运动,设运动时间为ts,解答下列问题:
![](https://img.xkw.com/dksih/QBM/2019/12/19/2358714676183040/2359351042662400/STEM/1732dbc53ba74e53bebc39a5a348d75e.png?resizew=554)
(1)运动过程中当点A在⊙P内时,t的取值范围是 ;
(2)当⊙P和△ABO的边相切时,求点P的坐标;
(3)当弧MN与Rt△ABO的边有两个交点时,请你直接写出t的取值范围.
![](https://img.xkw.com/dksih/QBM/2019/12/19/2358714676183040/2359351042662400/STEM/1732dbc53ba74e53bebc39a5a348d75e.png?resizew=554)
(1)运动过程中当点A在⊙P内时,t的取值范围是 ;
(2)当⊙P和△ABO的边相切时,求点P的坐标;
(3)当弧MN与Rt△ABO的边有两个交点时,请你直接写出t的取值范围.
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【推荐1】【概念认识】如果
,即
,则b叫做a和c的比例中项,或等比中项.若一个三角形一条边长是另两条边长的等比中项,我们把这个三角形叫做等比三角形.
(1)已知
是等比三角形,
,
.请直接写出所有满足条件的
的长;
【数学理解】
(2)如图1,在四边形
中,
,对角线
平分
,
.求证:
是等比三角形;
【问题解决】
(3)如图2,在(2)的条件下,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d4c2b2737fc11f96ecd8e2ae6591f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988b7e964e313579ab8869d67d5be007.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
【数学理解】
(2)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ae683c408ef00f0cd19d50fbeb0d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
【问题解决】
(3)如图2,在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78c44f837a63101c19745cc1a79a740.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/709fc8df-6df1-4ae9-8310-94aa752e113b.jpg?resizew=316)
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