如图,在△ABC中,
,D、E是△ABC内的两点,AD平分∠BAC,
.若
,
,求BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa14c146ac76fd05558c089cb12f787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd803e7b04190685303a471a1b1cddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5b7612e40f22a9fa011683ac6531e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/59dd92d7-d194-4021-bd6b-86a529b2aa14.png?resizew=120)
更新时间:2022-07-20 09:38:50
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】已知菱形
的边长为
,
,
,
为对角线
上的两个动点,分别从
,
同时出发,相向而行,速度均为
,运动时间为
秒,
.
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705266897584128/2710372361478144/STEM/dd38a6ad-9eae-4e14-be97-6e6fb8dc8299.png?resizew=215)
(1)直接写出
,
的长;(用含
的式子表示);
(2)若
,
分别为
,
的中点,
,求证:四边形
始终为平行四边形;
(3)在(2)的条件下,若四边形
为矩形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8273cfc2494403de8d04d64ca9cceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ba2098ed6b4137b08932524b72ba37.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2af378223bb955f96e9906d859f216.png)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705266897584128/2710372361478144/STEM/dd38a6ad-9eae-4e14-be97-6e6fb8dc8299.png?resizew=215)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8175f41f79b7dca24d168d882527aec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
(3)在(2)的条件下,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】在
中,
,点D是边
上一动点,连接
.将线段
绕着D逆时针旋转
得到
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/b030dd82-0ad1-43b4-9906-9ce92c86085f.png?resizew=474)
(1)当
时,
①如图1,若
,
,求
的长:
②如图2,过点C作
于F,当点D在线段
上时,过点E作
交
于点G.求证:
;
(2)如图3,若
,
,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/05df5a26c2b978503e93efa040b99508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/b030dd82-0ad1-43b4-9906-9ce92c86085f.png?resizew=474)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6662097cf94dc37facdaba44b49966d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ff13b4da65c7da3d898ba58e967b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②如图2,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e68633cbbe3cc2d0801305f81a7aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef976e2210e58efff2e8654d57cf5fed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebaf27e888824f9e070a06381f4e4bd.png)
(2)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e81e7aa0d4a8fb4cbf6a17dabcc326e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a59057b0db3f25c847f00958202245.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,
,
,
,
.点P从点A出发,以每秒2个单位长度的速度沿折线
向终点B运动,当点P与点A不重合时,过点P作
于点D,将线段
绕点P顺时针旋转
得到线段
,连接
.设点P的运动时间为x秒,
和
重叠部分的图形面积为y.
(1)当点P与点C重合时,
______;
(2)当点E在
上时,
______;
(3)求y关于x的函数解析式,并写出x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d0984bb4715e5e6100153012ddc5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/c130c373-e847-4778-80f0-d27f3ab13cd9.png?resizew=243)
(1)当点P与点C重合时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
(2)当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
(3)求y关于x的函数解析式,并写出x的取值范围.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,抛物线
与
轴交于点
,
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/d0d9f885-e3cf-4d1c-b7cb-6890e848ae43.png?resizew=215)
(1)求抛物线解析式及
点坐标;
(2)
为抛物线上一点,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee6f55f5de53781cc0e1c61f9fc5995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7480deb6fedddf1fb05d8cdb24be1703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/d0d9f885-e3cf-4d1c-b7cb-6890e848ae43.png?resizew=215)
(1)求抛物线解析式及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622c2808df4e2e5d297bad0150ae3278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在
中,DM、EN分别垂直平分AC和BC,交AB于M、N两点,DM与EN相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/90e92c3a-69eb-4e7d-95fa-3f038f69f80c.png?resizew=263)
(1)若
的周长为18cm,求AB的长;
(2)若
,求
的度数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/90e92c3a-69eb-4e7d-95fa-3f038f69f80c.png?resizew=263)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd761d1e34c9a268a78cc7dde69e69b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.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,直线
与
、
轴分别交于点
、
,过点
、
分别作
、
轴的垂线,交于点
,点
为
的中点.点
从点
出发,以每秒1单位的速度,沿
边
的方向运动,运动时间为
(秒).
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619019707269120/2623352378105856/STEM/911b5a33-fea0-43fc-ad69-16a66845b293.png?resizew=234)
(1)求点
的坐标;
(2)设
的面积为
,求
关于
的函数解析式;
(3)在点
的运动过程中,是否存在点
,使
是等腰三角形,若存在,请求出运动时间
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0c03f142eb32f553465728efc42cb1.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/8455657dde27aabe6adb7b188e031c11.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99693ea6739cb2266eb530645ef99f57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619019707269120/2623352378105856/STEM/911b5a33-fea0-43fc-ad69-16a66845b293.png?resizew=234)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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】在平面直角坐标系中,
为原点,点
,点
,把
绕点
逆时针旋转得到
,点A、
旋转后的对应点为
、
,记旋转角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/1c7f7fc1-9316-41f9-8c85-1e6b6812722a.png?resizew=245)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/176eee48-083a-42f7-9164-f354c57f79f1.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/beab5202-ed92-4949-8ebb-9b976c2b8c80.png?resizew=232)
(1)如图①,若
,求
的长;
(2)如图②,若
,求点
的坐标;
(3)如图③,P为AB上一点,且
,连接
、
,在
绕点B逆时针旋转一周的过程中,求
的面积的最大值和最小值(直接写出结果可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27149c9ff20937492950f42084caa019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8bfc9876ec81b013fd71a46c3e033b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/1c7f7fc1-9316-41f9-8c85-1e6b6812722a.png?resizew=245)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/176eee48-083a-42f7-9164-f354c57f79f1.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/beab5202-ed92-4949-8ebb-9b976c2b8c80.png?resizew=232)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
(3)如图③,P为AB上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/156e9b10ab97a8b56a9924b9c8bba059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78322f1db1b2e332225b9db53b9c54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3f7368811340328acf5be13f499d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ec46ccffcce226e3551c7f82d50ef2.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,在平行四边形ABCD中,AD⊥DB,垂足为点D,将平行四边形ABCD折叠,使点B落在点D的位置,点C落在点G的位置,折痕为EF,EF交对角线BD于点P.
(1)连结CG,请判断四边形DBCG的形状,并说明理由;
(2)若AE=BD,求∠EDF的度数.
(1)连结CG,请判断四边形DBCG的形状,并说明理由;
(2)若AE=BD,求∠EDF的度数.
![](https://img.xkw.com/dksih/QBM/2019/6/16/2226682787848192/2227540353761281/STEM/9d637686984a4e3c815642b558fc0697.png?resizew=207)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐3】如图,在
中,AB=AC,E是线段BC上一动点(不与B、C重合),连接AE,将线段AE绕点A逆时针旋转与
相等的角度,得到线段AF,连接
.点
和点
分别是边
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/7c58833d-17da-4a69-9182-fb6f8b868ea7.png?resizew=444)
(1)【问题发现】如图1,若
,当点E是
边的中点时,
____,直线
与
相交所成的锐角 的度数为______度.
(2)【解决问题】如图2,若
,当点E是
边上任意一点时(不与B、C重合),上述两个结论是否成立?若成立,请写出证明过程;若不成立,请说明理由.
(3)【拓展探究】如图3,若
,AB=6,
,在E点运动的过程中,直接写出GN的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/7c58833d-17da-4a69-9182-fb6f8b868ea7.png?resizew=444)
(1)【问题发现】如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf42a8dc862fbb78d6a780c420b24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a3464e90637e0fe75461c44096e746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)【解决问题】如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3cf42a8dc862fbb78d6a780c420b24a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)【拓展探究】如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49938ca6628df6a0e2f71434802990b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336cf2082c1f8d6a97ca630c9e5b45f1.png)
您最近一年使用:0次