在
中,
,
,点D在射线
上(点D不与点A,C重合),过点D作
于点E,过点D作
于点D,且
,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/ac97dd5b-aedb-4417-82f3-c1c9044ed251.png?resizew=326)
(1)如图1,点D在线段
的延长线上.
①求证:
;
②请判断线段
,
,
之间的等量关系,并说明理由;
(2)若
,请直接 写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e562c0e421b6a46d502a5cf81bdce731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcc5f2231720ef682d5812fbafd832f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/11/ac97dd5b-aedb-4417-82f3-c1c9044ed251.png?resizew=326)
(1)如图1,点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce726bceb02452bb4e5ed6b00fa94e9.png)
②请判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d6ca19c422ac559cc397d8e626f314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9800baf07bb7a7b410e3c6de4aa68cc1.png)
更新时间:2023-12-11 19:11:31
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四边形ABCD是正方形,点E,分别在BC上,点F在BA的延长线上,且CE =AF.
求证:①DE=DF;②DE⊥DF.
求证:①DE=DF;②DE⊥DF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/46d714e8-d388-48e9-adb4-28f46aa64bb7.png?resizew=133)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在四边形
中,对角线
、
相交于点
,设锐角
,将
按逆时针方向旋转得到![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617f2d3b5ce82c675623ce2dff4aebfb.png)
旋转角
连接
、
,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/40f77538-e79b-4a88-b8f6-87b40cebb6d6.png?resizew=327)
(1)、当四边形
为矩形时,如图1.求证:
.
(2)、当四边形ABCD为平行四边形时,设AC=
,如图2.
①猜想此时
有何关系,证明你的猜想;
②探究
与
的数量关系以及
与
的大小关系,并给予证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3eac617bb8fab0cdf923fd5442333e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1c4fa9fd4f69afe3abd84cf03e4f84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617f2d3b5ce82c675623ce2dff4aebfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870bc09e7436e1f22b9cdf2466ec6b38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6354f4a82aaa384d54a3766063f6e45f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfdcf0f283004878c27a1afc4f657dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfdcf0f283004878c27a1afc4f657dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/40f77538-e79b-4a88-b8f6-87b40cebb6d6.png?resizew=327)
(1)、当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339b70c2cf26ec632b02dfaea68d2111.png)
(2)、当四边形ABCD为平行四边形时,设AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9dc1f94910fea20e5c0d8253db1a47.png)
①猜想此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2752847fded12e8b8532605489ab9bf.png)
②探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfdcf0f283004878c27a1afc4f657dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8f5f10e9ca664a28a4e904c2c367b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
,
,将
绕点C顺时针旋转到
,其中点A,点B的对应点分别为点E,点D,连结
.
的延长线上时,
①证明:四边形
是平行四边形.
②若点A为
的中点,求四边形
的面积.
(2)如图2,当点D在线段
上时,若点D为
的中点,求
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/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
①证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
②若点A为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beeedb7ddaac2cd3d37151d058ab7fb.png)
(2)如图2,当点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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,已知点A、C分别在∠GBE的边BG、BE上,且AB=AC,AD∥BE,∠GBE的平分线BD与AD交于点D,连接CD,求证:CD平分∠ACE
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896310646857728/2951767773372416/STEM/d10abede-c54d-462a-ad7e-edace2669e9a.png?resizew=156)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】已知,如图,
是
的直径,点
为
上一点,
于点
,交
于点
与
交于点
,点
为
的延长线上一点,且
.
(1)求证:
是
的切线;
(2)若
的半径为10,
,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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f4a6920a0dc269d5d1781e87fe84f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f3700c45a84b02f153ea0fb20b4bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/136e8234689ae625e87b38d776926430.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/d0d443f1-c43d-478f-8434-5997b93f2447.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab6b7f0d88caf738cc0648a9cbb87ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.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,在四边形ABCD中,AD
BC,对角线BD的垂直平分线与边AD、BC分别相交于点M、N.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/c227a2ac-8792-4856-b113-9aecb429db73.png?resizew=136)
(1)求证:四边形BNDM是菱形;
(2)若∠C=90°,BC=16,CD=8,求菱形BNDM的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/c227a2ac-8792-4856-b113-9aecb429db73.png?resizew=136)
(1)求证:四边形BNDM是菱形;
(2)若∠C=90°,BC=16,CD=8,求菱形BNDM的周长.
您最近一年使用:0次