如图,在平面直角坐标系中,
,
,A为
轴上一动点,点A不与原点重合,将
绕点A顺时针旋转
得到
,点
,
与点
,
是对应点.
(1)求
,
的度数;
(2)当
取到最值时,画出此时
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83ebc472717d6ddeeeabeb6dff738a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b3060cc4605a5d756787e2e745b887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4038b9897621e1c5b23d283d619d3924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/3d40d6ab-bc9a-45b4-b26f-d77ddd0584fc.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/da890a31-20b4-4c5a-ad93-c447c7baadc4.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/00c3891f-5192-454a-a77b-909ffee11b0a.png?resizew=167)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f8a909bcabd280fb3ddcb1eb9adb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db41884e87c26931304ef58f8031078a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ad8115387158c8dda205d26968ba11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9316ff796722ed923b17154ca739fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
更新时间:2023-12-10 08:29:29
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】在平面直角坐标系中,
如图所示,
,
.点P从点O出发在线段
上以每秒1个单位的速度向点A运动,同时点Q从点B出发在线段
上以每秒2个单位的速度向点C运动.其中一个点到达终点时,停止运动,连接
.
(1)如图1,连接
交
于点D,则点D的坐标为________;
(2)如图2,过A作
于点H,求
的最小值;
(3)如图3,在
上取一点M,使得
,那么点M的纵坐标是否存在最大值,若存在,求出此时
的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e698404fde91350c873592032ea5326.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c905c723e30f28088fd7f7dc09ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ccb66c4673bac61f91a3223ad6ac59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)如图2,过A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5ae0e3931f519c6009e13a8d93634e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49a64a821a7bfa7dedf97b263b055ca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://img.xkw.com/dksih/QBM/2021/6/20/2746970177478656/2800930095022080/STEM/a1f39b17-9ac0-4566-adef-0df57e864ee0.png?resizew=612)
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【推荐2】如图,在平面直角坐标系中,O为坐标原点,直线
:
与
轴、
轴的正半轴分别相交于点A、B,过点
作平行于
轴的直线交
于点D,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/cb37b4af-5b77-437e-b7f4-a2c66add1f9f.png?resizew=193)
(1)求直线
的解析式;
(2)求证:
是等腰直角三角形;
(3)将直线
沿
轴负方向平移,当平移恰当的距离时,直线与
,
轴分别相交于点
,在直线
上存在点P,使得
是等腰直角三角形,请直接写出所有符合条件的点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe22d0cee40ad652466d25d9e7c9264.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/aa3ed5e452abfb4593c3609c98f7c8ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640f058b479299659893cf524ddf6544.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/cb37b4af-5b77-437e-b7f4-a2c66add1f9f.png?resizew=193)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/4a8024ad868c4af92e21e7d7626ae9e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e40a2abe33ae60ee14f67c7d1621949.png)
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【推荐1】如图1一直角三角板,
,
,过点C的直线l不经过三角形内部,过点A、B作
,
,垂足分别为D,E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/c497db8d-540e-4186-b41a-ab8b336d085a.png?resizew=473)
(1)请你在图1中写出一对全等三角形:___________
(2)请证明你所写结论.
(3)尝试探究:若
,
;
①图1中四边形
的面积为:___________(用含a,b的代数式表示,)
②图2中过点C的直线l经过三角形内部,其它不变,则四边形
的面积为:___________(用含a,b的代数式表示,)
(4)拓展应用:
,
,则B点坐标为:___________;若点P(不与B重合)在坐标平面内,若
与
全等,则点P的坐标为:___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c182a9d9fd0a7023b710cd671d9468e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/c497db8d-540e-4186-b41a-ab8b336d085a.png?resizew=473)
(1)请你在图1中写出一对全等三角形:___________
(2)请证明你所写结论.
(3)尝试探究:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5228da61bed106b28849ef91a2ec116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa7f65e4db07f1ddbc342a5cc9b28b1.png)
①图1中四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d498a0467ff3c577a7ed175d7bffd885.png)
②图2中过点C的直线l经过三角形内部,其它不变,则四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d498a0467ff3c577a7ed175d7bffd885.png)
(4)拓展应用:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec32b9cfee142d1d4f68ab4771de77c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/6b9cb5ff-2699-4afc-a865-abff8ba40925.png?resizew=230)
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【推荐2】(1)如图①所示,将
绕顶点
按逆时针方向旋转
角,得到
,
,
分别与
、
交于点
、
,
与
相交于点
.求证:
;
(2)如图②所示,
和
是全等的等腰直角三角形,
,
与
、
分别交于点
、
,请说明
,
,
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4523e4270902cdb77983d2f740c9de74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc32161c954468f125e581c782708e0.png)
(2)如图②所示,
![](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/460511579aaa077d85fe53f6bb7772d5.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5f736b1195fef1d2d300168a795f1.png)
![](https://img.xkw.com/dksih/QBM/2020/4/7/2436557971030016/2437072012230656/STEM/34cfd2304a344820b138e51abcc2ec6f.png?resizew=450)
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较难
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【推荐1】如图,
为
轴上一个动点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d104ebb2a455891c257b5122887f4cf2.png)
(1)如图1,当
,且
按逆时针方向排列,求
点的坐标.
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408157525655552/2408914869542912/STEM/4c238777-3d6e-43cc-bc23-2994afa2f296.png)
(图1)
(2)如图2,当
,且
按顺时针方向排列,
连
交
轴于
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408157525655552/2408914869542912/STEM/fedd594d-4946-495c-958d-18d071844bc5.png)
(图2)
(3)如图3,m>2,且
按顺时针方向排列,若
两点关于直线
的的对称点,画出图形并用含
的式子表示
的面积![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c2349878411b1e429cb32ebb9e4a84.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408157525655552/2408914869542912/STEM/8b2241b6-a338-4058-878c-f727abf71212.png)
图3
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d02e2e35401de96c49ea3c1cb07f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d104ebb2a455891c257b5122887f4cf2.png)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408157525655552/2408914869542912/STEM/4c238777-3d6e-43cc-bc23-2994afa2f296.png)
(图1)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e810cb506e1746a0a49610e0d897f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408157525655552/2408914869542912/STEM/fedd594d-4946-495c-958d-18d071844bc5.png)
(图2)
(3)如图3,m>2,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1735c008031004b8c387d1e1376978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02e6159fac6a056b6e52264f61339ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c2349878411b1e429cb32ebb9e4a84.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408157525655552/2408914869542912/STEM/8b2241b6-a338-4058-878c-f727abf71212.png)
图3
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名校
【推荐2】如图,
中,
,点D是斜边AB上一点,
为
的外接圆,BC交
于点F,连结FD并延长至点E,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/93e3c873-53b8-445f-906e-f6c7bad0ebbe.png?resizew=148)
(1)当
时,求
的度数;
(2)若
,当
为等腰三角形时,求CF的长;
(3)设
,若
的外心I恰好落在
上,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e932b4add3175358f15be0e1f7104e79.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/93e3c873-53b8-445f-906e-f6c7bad0ebbe.png?resizew=148)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39756e292476709bdc3daef9af9a7e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f34868b311f1082fb003dec7f07cdfd2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147f11b5ddcfd1b572dc2943e97dcfca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c026f898601d9fac3a43a02ec014b90c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】【问题提出】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/539f3ad9-5308-4eae-ad77-ace82cbde124.png?resizew=458)
(1)如图①,将
绕点
逆时针旋转
得
,连接
,
,根据条件填空:
①
的度数为______;②若
,则
的值为______;
【问题探究】
(2)如图②,在
中,
,沿边
翻折得到
,点
的对应点为点
,点
,
分别在
,
边上,且
,试猜想线段
,
,
之间的数量关系,并说明理由;
【问题解决】
(3)如图③是公园人工湖的平面示意图,现要在人工湖对角线
上架一座人行景观桥,但由于年代久远,人工湖规划书上只留下以下数据,
,
,
,
,且
,求对角线
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/539f3ad9-5308-4eae-ad77-ace82cbde124.png?resizew=458)
(1)如图①,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2db6311e228ed33b6c71d0a5918cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
【问题探究】
(2)如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2939baca4e74181488fd5e5ad629cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
【问题解决】
(3)如图③是公园人工湖的平面示意图,现要在人工湖对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7305de9211785b826823153897b17517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53fb801492547415d3040a767c2d48b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79b03e06f3fb93fe1a5f009f48afc5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669f7a1e43ef893ef3a45fc47992947f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2915ea6f8ea0cb67a6b135ff275b4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图1,在
中,
,点D在
上任意一点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/847b20d6-28a7-41f3-8410-059bba128b96.png?resizew=483)
(1)如图1,D为
中点,
,
,求
的长;
(2)如图2,若
,E为
的中点,猜想
与
之间的数量关系,并证明你的猜想;
(3)图3,点G为
边上一动点,连接
,将线段
绕点D按逆时针方向旋转
至
,连接
,已知
,
,
,当
的长取得最小值时,请直接写出此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/847b20d6-28a7-41f3-8410-059bba128b96.png?resizew=483)
(1)如图1,D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)图3,点G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a641164375c0be5250c296074212dc2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa7845a64b2a7a785cebc0511087615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129b68a230d14dfac7850a2fcf3a6d6f.png)
您最近一年使用:0次