如图1,在
中,
,点D为AB边上一点(不与A,B两点重合),过点D作
,交AC于点E.连接BE,在BE上取一点M,连接CM并延长CM至点N,连接BN.
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967354227269632/2968753333477376/STEM/74e0e78e-cef3-40cc-8240-70fa6b23a2f6.png?resizew=458)
(1)观察猜想
若
,
,则线段CE与BN的位置关系是______,
的值是______;
(2)类比探究
将
绕点A顺时针旋转至如图2所示的位置,
,
,写出线段BN与CE的位置关系及
的值,并说明理由;
(3)解决问题
绕点A在平面内自由旋转,
,
,若
,
,以点B,D,E,N为顶点的四边形是菱形,直接写出线段BM的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://img.xkw.com/dksih/QBM/2022/4/27/2967354227269632/2968753333477376/STEM/74e0e78e-cef3-40cc-8240-70fa6b23a2f6.png?resizew=458)
(1)观察猜想
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec47d2c09185114c47346abacce1ee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fe7126f04de28d2f73f254f44077da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8bd6bf9fb27cc57a288a4173f0dc12.png)
(2)类比探究
将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f686ea78d86ce8d8398083002895c192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7270d89ddd388bad8032ae1d56fe1139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8bd6bf9fb27cc57a288a4173f0dc12.png)
(3)解决问题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f686ea78d86ce8d8398083002895c192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7270d89ddd388bad8032ae1d56fe1139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
更新时间:2022-04-29 19:27:01
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】
和
有公共顶点
,
,
,
,
,点
是
的中点,连接
并延长交直线
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/f4014adc-aecf-4bf5-a4c3-19eb36ebb0fa.png?resizew=549)
(1)如图1,当
时,求证:
①
;
②
是等腰直角三角形.
(2)如图2,当
,点
在直线
同侧时,直接写出:
①
是何种特殊三角形;
②线段
之间的数量关系.(无需证明)
(3)如图3,当
,点
在直线
异侧时,(2)中的结论是否依然成立?若不成立,请直接写出新的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d831c9ba6d18774540e2aaa29132fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabd1d9b7e7f7ecb788ff542218af2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.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/6c50cabc089584cf0ee7a12e0bf60caa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/f4014adc-aecf-4bf5-a4c3-19eb36ebb0fa.png?resizew=549)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc382c4f315de17f293d3d273626ade2.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79c5041878c15de69253ca11a03ab1b.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dba5ff9c5af388c604aa712fbc212c8.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】某兴趣小组开展综合实践探究活动:
已知
为等边三角形,点
,
分别在边
,
上,且
,
,
相交于点
,连接
.探究过程如下:
(1)①如图1,当点
为
中点时,
;
②如图2,当
时,
;
(小智积极思考,提供如下解题思路:
延长
至点
,使得
,连接
,
.
,
,
,
.
.
又
,
.
又
,
是等边三角形.……)
【类比探究】
(2)如图3,当
时,求
的值;
【拓展延伸】
(3)①当
时,直接写出
的值(用含
的式子表示);
②当点
在
延长线上,点
在
延长线上时,且
,直线
,
相交于点
,连接
,请直接写出
的值(用含
的式子表示).
已知
![](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/2a30f3a8b673cc28bd90c50cf1a35281.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/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(1)①如图1,当点
![](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/a1de94901207fc22febd4bf4760fd970.png)
②如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9b0d3cf342e065b4c8e21443bfbfbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8228b61810f3d48ab3bb118d0e6a07c6.png)
(小智积极思考,提供如下解题思路:
延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587eab9a26310dc294effac917a4178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fb9bc6163bd3f8aa1a8b0a70c9cbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbf18a89d2bc8795a4393d02b0f970e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93fe27a2f7a406c1dbbe4d95db109744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33414fdfa12f64e52fd438690063b1f0.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed62aa0840db9c22386593d596593de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6711c81a608af5754aa603b820753002.png)
又
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cc50ad2ba6b7f2571f6d83a689c969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd2f4363d0d5996571b458d2539bde2.png)
【类比探究】
(2)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942a9a6bde4a5b9803b68b1e9065de62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424dd73a238dad799c9296e9ff829253.png)
【拓展延伸】
(3)①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ca85a8426af15089c9a0e599b0748a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424dd73a238dad799c9296e9ff829253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.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/7aed9117f66f0f21602ccd31cce376ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcce0893aa84f73e5f5d05ddab5d0848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】在边长为8的等边三角形
中,D为
的中点,E,F分别为
、
上任意一点,连接
,将线段
绕点E顺时针旋转
得到线段
,连接
交
于点N,连接
.
(1)如图1,点E与点C重合,且
的延长线过点B,证明:四边形
是菱形;
(2)如图2,
的延长线交
于点M,当
时,求
的度数;
(3)如图3,E为
的中点,连接
,H为直线
上一动点,连接
,将
沿
翻折至
所在平面内,得到
,连接
,直接写出线段
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/6/4a9014d9-9cc4-4dd2-848b-dbd07b9eebec.png?resizew=533)
(1)如图1,点E与点C重合,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f875de8bec0ffc84b8142f81080058.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d20423901199473026f14e7b4797a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb04f507cc2eadbb5881f815d206d81e.png)
(3)如图3,E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc5c12b241539cc99487865f7d8bf34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601429eb4fcaef99f65d78ac38a3d28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f85cd6c591dcb433a553fdc72fda9b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f85cd6c591dcb433a553fdc72fda9b3.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,
是等腰直角三角形,
,
,
为边
上的一点,连接
,将
绕点
旋转到
的位置.
,求
的度数;
(2)连接
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4557ee10ad429943f40252d9bb90565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec53f6d14ffde50237af92d783ee182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解答题-作图题
|
较难
(0.4)
【推荐1】在11×11的网格中建立如图的平面直角坐标系,△ABC的顶点坐标分别为A(1,6),B(4,1),C(1,1).仅用无刻度的直尺在给定网格中按下列步骤完成画图.
(1)在第一象限内画出点D,使得AD⊥AB,且AD=AB.并写出点D的坐标 .
(2)在线段BD上画点E,使∠DAE=45°(保留画图过程的痕迹);
(3)画出AB的中点F,在BC的延长线上找到一点P,使得∠BPF=∠BAC.则点P的坐标为 .
(1)在第一象限内画出点D,使得AD⊥AB,且AD=AB.并写出点D的坐标 .
(2)在线段BD上画点E,使∠DAE=45°(保留画图过程的痕迹);
(3)画出AB的中点F,在BC的延长线上找到一点P,使得∠BPF=∠BAC.则点P的坐标为 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/350ecab4-6d85-410e-ad5e-09213e171a00.png?resizew=301)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知
是等腰直角三角形,
,
,点D在线段
上运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/25582401-7c27-4a66-9d21-bf3a90eb3c7a.jpg?resizew=455)
(1)如图1,连接
,过点C作
交
的延长线于点E,过点A作
交
于点F,若
,
,求
的长;
(2)如图2,点H是
边上一点,连接
,过点A作
交
延长线于点G,若
,将
绕点D顺时针旋转
得到线段
,
交
于点K,连接
,过点C作
交
于点N,垂足为P,求证:
;
(3)如图3,若
,连接
并将
绕点D逆时针旋转
得到线段
,连接
、
,取
中点T,点R在
上且
,连接
,直接写出当
取得最小值时
的面积.
![](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/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/25582401-7c27-4a66-9d21-bf3a90eb3c7a.jpg?resizew=455)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6d946ec5bc75341f7e5fe400054464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad6f8846d4294ae3789a6ddd17af5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd019def185df32cbc2dfe0da99c7746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)如图2,点H是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de13b90ee61450dcf26f2f04b010b3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3064b70f24e9bbcab76e0dc61274b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd158a566da912ce1f2abf0c0432c16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c6c1d2e001faabec3d2f3022268e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d02938a759f4652429b7ad53beac8b1.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d0068cc7b31aff5ffa59edc3df4ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0cb4b2e0a7af501779001e4f6bb6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c642e4e4a1fa59c83eac9288157c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab142c659d5434d88d7f6f5d994cfd18.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】问题背景:如图,已知
的顶点
在
的边
所在直线上(不与
,
重合),
交
所在直线于点
,
交
所在直线于点
,记
的面积为
,
的面积为
,初步尝试:如图
,当
是等边三角形,
,
,且
,
时,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43c27137c079feb444dcfc4b624aec5.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/cc1c38d2-ab82-46b5-9d30-b7da050e5019.png?resizew=153)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/3a1944a7-aa8a-429a-8380-ab22e51da162.png?resizew=157)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/5316b52d-fee2-48ef-801e-b11d2c45042d.png?resizew=150)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/a43ea301-06e2-4fde-a1af-e1f7a4461daf.png?resizew=217)
(1)类比探究:在上述条件下,先将
随点
沿
平移,使
,再将
绕点
旋转至如图
所示位置,求
的值.
(2)延伸拓展:当
是等腰三角形,
时,设
.
①如图
,当点
在线段
上运动时,设
,
,求
的表达式(结果用
,
和
的三角函数表示);
②如图
,当点
在
的延长线上运动时,设
,
,直接写出
的表达式,不必写出解答过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796f98dedb8b0f0e1ace4abec2054d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.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/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2bd387ad688461e522af5acf2108d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701e8fe74f0afb74b16fc977fed34d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5864e5f07bc5ef8133d7e5c60f59532e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0097f257192599e184a30646921cc8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377f5c10cf527c87ab06bff61384f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23753d08715918fc5e919082e8f89b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf3746205daae4787d8e31d74ba79e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43c27137c079feb444dcfc4b624aec5.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/cc1c38d2-ab82-46b5-9d30-b7da050e5019.png?resizew=153)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/3a1944a7-aa8a-429a-8380-ab22e51da162.png?resizew=157)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/5316b52d-fee2-48ef-801e-b11d2c45042d.png?resizew=150)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2970849260912640/2987860045873152/STEM/a43ea301-06e2-4fde-a1af-e1f7a4461daf.png?resizew=217)
(1)类比探究:在上述条件下,先将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796f98dedb8b0f0e1ace4abec2054d43.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/7ac943d8c2eb91c0082ada87857d1ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796f98dedb8b0f0e1ace4abec2054d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925e47170228840c21d702d5958edf1a.png)
(2)延伸拓展:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c287bb15494297df234f700f9f3a90d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0e53a7cb4b8ad52509f38c33f71a87.png)
①如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.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/198b0da7bd476f517d5ab82d097c3e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109817b07ac0ff8a1f080f0c5ae051fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925e47170228840c21d702d5958edf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ff8c8d239cc12ddc3a899e9f054aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198b0da7bd476f517d5ab82d097c3e75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109817b07ac0ff8a1f080f0c5ae051fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925e47170228840c21d702d5958edf1a.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/ad85603c-71b3-4998-b0f7-5e1df73c3f0c.png?resizew=386)
如图1,四边形ABCD和四边形BCMD都是菱形,
(1)求证:∠M=60°
(2)如图2,点E在边AD上,点F在边CM上,连接EF交CD于点H,若AE=MF,求证:EH=HF;
(3)如图3,在第(2)小题的条件下,连接BH,若EF⊥CM,AB=3,求BH的长
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/ad85603c-71b3-4998-b0f7-5e1df73c3f0c.png?resizew=386)
如图1,四边形ABCD和四边形BCMD都是菱形,
(1)求证:∠M=60°
(2)如图2,点E在边AD上,点F在边CM上,连接EF交CD于点H,若AE=MF,求证:EH=HF;
(3)如图3,在第(2)小题的条件下,连接BH,若EF⊥CM,AB=3,求BH的长
您最近一年使用:0次