![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4300aefd67369742e2b1ddcdc02dd495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a3d7401dd0c7fa9eebea579f6fdf8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.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/4e618585eafcd5f75a69755808c1b65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c40d5bc57c254305ce4a1ee012a3d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b52fbf3015f78f9fc9047be17ea18.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/467c2b64e1171eaa733aa0b6b75514e9.png)
(3)如图3,将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad1b0a76a887783392268ae203ad22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5118457f0f95d80928372e8184dcce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5252c0e7f660497812ced6f0fe081ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d527d4795ece4a5756d1cf8dba31e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c336ed32189262185fc65859d86bb101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e0227d13077891c566356ceeb354de.png)
更新时间:2024-05-24 21:51:46
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】已知,在
中,过点
作
于点
,若
,
.
(1)如图
,求证:
为等边三角形;
(2)如图
,点
在
的延长线上,点
在
上,连接
、
,若
,求证:
;
(3)如图
,在(
)的条件下,连接
,取
的中点
,连接
并延长交
于点
,若
,
的面积为
,求
的长.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b07d96dc07e1b07c29884ecf82e3385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/d3963782-647a-4de8-94a6-f7d54fd9a3ed.png?resizew=513)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60e36e7ac279135e93bf11d7b48b3ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee2acda6dbad2fd5cada1b339bc5227.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff96d337f35747d655c475a56e9a332.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c4750875c2116879747e9d35178db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27567d43c5b91382ee3d7ca708ee422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】在
中,
边上的中线
的取值范围(1)小明在组内经过合作交流,得到了如下的解决方法(如图):
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/44dbe43f-bddc-4607-9eff-4a356671d341.png?resizew=346)
(1)①延长
到Q,使得
;
②连接
,把
集中在
中;
③利用三角形的三边关系可得______
______,则
的取值范围是_____
_____.
感悟:解题时、条件中若出现“中点”“中线”等条件,可以考虑倍长中线,构造全等三角形,把分散的已知条件和所求证的结论集中到同一个三角形中.
(2)请写出图1中
与
的位置关系并证明;
(3)思考:已知,如图2,
是
的中线,
,试探究线段
与
的数量和位置关系,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9941b4190aa0495f2af8af024fd3d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/44dbe43f-bddc-4607-9eff-4a356671d341.png?resizew=346)
(1)①延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6606b1bf5817670acf8093897d56089.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3b84384bcec113b1f33377f387c41c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905b86ec7f277f577184b035b2ccaf0b.png)
③利用三角形的三边关系可得______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ddb4ad4894c10bb7c751ce0d80801e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7529bcb2517e5fbfe004a6656a1420b1.png)
感悟:解题时、条件中若出现“中点”“中线”等条件,可以考虑倍长中线,构造全等三角形,把分散的已知条件和所求证的结论集中到同一个三角形中.
(2)请写出图1中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
(3)思考:已知,如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9224b90f9a2de45b4a6e8d2568a164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】对于x轴上一点P和某一个函数图象上两点M,N,给出如下定义:如果函数图象上的两个点M,N(M在N的右侧),在x轴上存在点P,使得
,那么就称
为点P的“伴随三角形”,点P则被称为线段
的“伴随点”.
(1)若一次函数图象上有两点
、
,在点
、
、
、
中,线段
的“伴随点”有_________;
(2)若直线
分别与y轴、x轴分别交于点M、N,以
为“伴随点”的“伴随三角形”恰好是一个直角三角形,求此直线的解析式.
(3)若点M是抛物线
的顶点,
,若在x轴上存在伴随点P,请求出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add60595ecea5d00ff1fbb2a5409be73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3de0022a7f2e122492f1483e4d3cccba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(1)若一次函数图象上有两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7661424cf674980a55cd165899fdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d2d3b514b0720a84d6ad89e9e49f0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d821b31612438e6e96b4bc232a01533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a835058736bc550b2da6686a7c310cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e88e4ba340b8dccca21a5b6992c5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2537199435b5a34d0a8ac5faa39f1e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c454d7cebb5355b61d71cafb47afd72.png)
(3)若点M是抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7164103d53aaab8e9eab7478f0c608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b0dfa6898f9560ab8a5e5905c1f81f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】问题发现:
(1)正方形ABCD和正方形AEFG如图①放置,AB=4,AE=2.5,则
=___________.
问题探究:
(2)如图②,在矩形ABCD中,AB=3,BC=4,点P在矩形的内部,∠BPC=135°,求AP长的最小值.
问题拓展:
(3)如图③,在四边形ABCD中,连接对角线AC、BD,已知AB=6,AC=CD,∠ACD=90°,∠ACB=45°,则对角线BD是否存在最大值?若存在,求出最大值;若不存在,请说明理由.
(1)正方形ABCD和正方形AEFG如图①放置,AB=4,AE=2.5,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c43992343e9303892661a2bfce074f4.png)
问题探究:
(2)如图②,在矩形ABCD中,AB=3,BC=4,点P在矩形的内部,∠BPC=135°,求AP长的最小值.
问题拓展:
(3)如图③,在四边形ABCD中,连接对角线AC、BD,已知AB=6,AC=CD,∠ACD=90°,∠ACB=45°,则对角线BD是否存在最大值?若存在,求出最大值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758143633121280/2799992256143360/STEM/e9466a7e716a439ead41907a9ec41920.png?resizew=497)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】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)
【推荐2】平移、旋转、翻折是几何图形的最基本的三种图形变换,利用图形变换可将分散的条件相对集中,以达到解决问题的目的.
内一点,
.求
的度数.
解:将
绕点A旋转到
的位置,连接
,则
是 三角形.
∵
,
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eeaec44d0a4a0302f02c000d135205d.png)
∴
为 三角形.
∴
的度数为 .
(2)类比延伸:如图2,在正方形
内部有一点P.连接
,若
,求
的长;
(3)拓展迁移:如图3,若点P是正方形
外一点
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca9899fbb736aa2963ab88cf2919ace.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
解:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77565c0aab1ab567e92dc1aee447e271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2f90f1f950f19b10ee0b1852cec730.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce13df595fb01b3c7a613da1d34d8f7.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eeaec44d0a4a0302f02c000d135205d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8760d054667817c5b0c7889d111b59.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(2)类比延伸:如图2,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c7267e5313b9b00ef22c94a479fc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78424ce65f704c5e6aedc299a5349b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)拓展迁移:如图3,若点P是正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04b36334d4d055005da1dcb164cb117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.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】如图,
是
的直径,弦
,垂足为
为
上一点,过点
作
的切线,分别交
的延长线于点
.连接
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/525380e1-dbd3-4479-a946-4cccd54eedb1.png?resizew=214)
(1)求证:
;
(2)连接
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de3bb469f36ff3561ac07ffd349e0be.png)
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1548e14a52dd7e89a8688f0ef95bfee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217ef4133057ffd2a3b1a2da7c59045a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/525380e1-dbd3-4479-a946-4cccd54eedb1.png?resizew=214)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/584f8476a1dba05a8c0bd6121cdf6611.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1de3bb469f36ff3561ac07ffd349e0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc4cc41b7335dabefd1f1502a07224e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.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,
为
的直径,
为
上一点,
和过点
的切线互相垂直,垂足为点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/969122f5-f4e6-4462-9cfb-4b01e167e281.png?resizew=479)
(1)求证:
平分
;
(2)如图2,若
,点
是半圆
的中点,连接
,求
的长;
(3)如图3,
交
于点
,点
是半圆
的中点,作
于点
,交
于点
,试探究
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/969122f5-f4e6-4462-9cfb-4b01e167e281.png?resizew=479)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e5e5bb7d67cbd8be493a855a87fce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430dfc0e41bcd1427cf7ceee14299cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141ee0cedfea5ae83aaac1106e2cc259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d9a27b98bb1f3747328065ecbcf71d.png)
您最近一年使用:0次