已知
中,
,
,
为
边上中线,求
和
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ff5fcad35756d6bc7b2baa9068ad63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defdf69f0eb7e573b976a9b9d8027e79.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/5034de0f-74e4-42b7-860d-4a10055080ae.png?resizew=120)
更新时间:2023-11-04 09:16:02
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在梯形
中,
,点E在边
上,
,
的延长线与
的延长线相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/fac8d663-df54-438e-99f9-e73dc1d2f01e.png?resizew=176)
(1)求证:
;
(2)当点E为
中点时,求
的长;
(3)设
,试用x的代数式表示y.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a510c5d2f74c9e6860f367a574167fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878a63a7899c8226744748a0102eab95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/fac8d663-df54-438e-99f9-e73dc1d2f01e.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9b11f2ea112fff1885811bd5bc73cc.png)
(2)当点E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9e65d36ae4d16f468043941954ff30.png)
您最近一年使用:0次
解答题-应用题
|
适中
(0.65)
【推荐2】如图,武汉光谷为庆祝“两会”的召开,园艺工人要在二妃山一块Rt
(
)的空地上划出一个
后,种植出如图中阴影部分图案的草坪.测得
米,
米,
米,
米.求图中阴影部分的面积.
![](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/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313cfe91ae6e19135fa13ad96df2ef75.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,将矩形纸片ABCD(AD>DC)沿着过点D的直线折叠,使点A落在BC边上,落点为E,折痕交AB边于点F.
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900895779233792/2917120236388352/STEM/c66ac2032e7547d790e47f77f744ee5a.png?resizew=121)
(1)若BE=1,EC=2,则sin∠EDC= ;
(2)若BE:EC=1:4,CD=9,求BF的长;
(3)若BE:EC=1:m,求 AF:AB(用含有m的代数式表示).
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900895779233792/2917120236388352/STEM/c66ac2032e7547d790e47f77f744ee5a.png?resizew=121)
(1)若BE=1,EC=2,则sin∠EDC= ;
(2)若BE:EC=1:4,CD=9,求BF的长;
(3)若BE:EC=1:m,求 AF:AB(用含有m的代数式表示).
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是
内接三角形,
是
的直径,点
是弦
上一点,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/d735a370-93c3-403e-bf01-9aa3b196842f.png?resizew=121)
(1)若
,求证:
;
(2)在(1)的条件下,若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/d735a370-93c3-403e-bf01-9aa3b196842f.png?resizew=121)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47a6cf7548e70addabb57ffac8c909a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c0420cd6464b412000af879151eaef.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377f5c10cf527c87ab06bff61384f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b432eeda4f78551d0b4fdd86913d0962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc3b1bc4184b59e093be7cdd5f4967e.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐1】(1)如图1,在平面直角坐标系
中,请画出
关于直线的对称图形
.
(2)如图2,在菱形网格图(最小的菱形的边长为1,且有一个内角为
)中有一个
,将
绕某点
旋转得到
,请标记旋转中心
.(不需要保留作图痕迹)
(3)在(2)的条件下,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)如图2,在菱形网格图(最小的菱形的边长为1,且有一个内角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(3)在(2)的条件下,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0b732912cec85d7818ba891cdf82ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/69cfba59-bfab-40b8-8ca0-21ba04d108d9.png?resizew=689)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
,点
、
分别在
、
上,
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae27dafab4a4d80a252e044625dff20d.png)
(2)若
,求证:
;
(3)在(2)的条件下,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4c276c6cc9a95b4c1ebb881e2b97a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/7bedee62-beaf-47e6-a5d7-14e07e2d51af.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae27dafab4a4d80a252e044625dff20d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb64353c99068a7a1a8508a22f5b25b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e55929858a63f736cbee74256aab53e.png)
(3)在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5406dc777a71c473fc7140cf39a21c5.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
|
适中
(0.65)
名校
【推荐1】如图,
内接于
,且
为
的直径,过点C作
的切线,交
的延长线于点D.已知
求
的长.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4574aa06af90ff165eab30caf9d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在
中,
,点
在斜边
上,以
为直径的
与
相切于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/1f7c19ac-d31c-4e36-a883-04c814e967ac.png?resizew=123)
(1)求证:
平分
;
(2)若
,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/1f7c19ac-d31c-4e36-a883-04c814e967ac.png?resizew=123)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ec0210f26256b3a8499f6f1a237b493.png)
您最近一年使用:0次