如图,
是等边三角形,
为中线,
,
在
上,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.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/836ea820cf3732508cdd332ceb9395ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/21/8f7f36c1-f657-4eaf-b9c2-fc7dd75a7dd3.png?resizew=154)
更新时间:2023-05-17 09:56:52
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相似题推荐
解答题-证明题
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【推荐1】如图,点
,
,
,在一条直线上,
与
相交于点
,其中
,
,
.
;
(2)若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a510a3eb906b3ef0760b0d1723d11ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499c1138294ecfbb0fd556802e08f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424269ceef173843aae76e39ecdf6111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac61f3477e623aa4f924a82bd7a06ce4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d53c82934dd013b37e71f56fe0dbf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f06687d29d5168896285ffd29670fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
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【推荐2】如图,在△ABC中,∠B=40°,∠C=60°,点D,E分别在边BC,AC上,且DE∥AB,若∠CAD=25°,求∠ADE的度数.
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852751258337280/2917821906550784/STEM/d61a89a8-3b53-4cbd-b3b6-e1ed69b4a649.png?resizew=227)
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【推荐1】已知,在
中,
.
(1)如图1,
,求
的度数;
(2)如图2,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/86ff0f92-7e1f-438f-9e35-1232a088fab6.png?resizew=270)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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解答题-证明题
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【推荐2】如图,已知
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/d62b95ab-5017-480a-8d18-05b5beea701d.png?resizew=163)
(1)求证:
;
(2)如果
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab41054fa9ce51b68e78d9c0cf398d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7852eb99a283b8f0bd5a4dff3c2def.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/d62b95ab-5017-480a-8d18-05b5beea701d.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab083b4fd82749bcf218be6131baac63.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216792b94dbca306d12792af693e11a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1e937359a23accfb0bbeed55e4ce0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1caed8e8c73589dab6dba2bde590a735.png)
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【推荐1】如图,在平面直角坐标系中,△AOB是边长为3的等边三角形,将△AOB绕着点B按顺时针方向旋转得到△DCB,使得点D落在x轴的正半轴上,连接OC,AD.
(1)求证:OC=AD;
(2)求OC的长.
(1)求证:OC=AD;
(2)求OC的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/a9534200-f68c-4aac-8389-16d6a6f7a96e.png?resizew=185)
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【推荐2】如图,等边△ABC,D、E分别在BC、AC上,且CD=AE,AD、BE相交于点P,试求∠BPD的度数.
![](https://img.xkw.com/dksih/QBM/2012/11/29/1573562965082112/1573563052933120/STEM/25faa2f3b6d64159a8b04dc695c405f5.png?resizew=89)
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