如图,在
中,
、
,的平分线相交于点O,过点O的直线
,分别交
、
于点D、E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/7b11eb6c-8d12-4acf-ab2c-3c58434bfc11.png?resizew=164)
(1)求证:
;
(2)若
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d021981c03e75b1a246d899dcc64656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/7b11eb6c-8d12-4acf-ab2c-3c58434bfc11.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89625f8d144ff01973a9f79bd3efabd4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
更新时间:2024-01-13 00:59:45
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
是
边上的高,
平分
交
于点
,
交
于点
,若
,
.
![](https://img.xkw.com/dksih/QBM/2019/5/5/2197165370318848/2197701810364416/STEM/ba635340d5f2435cbf9b2d1dda673bad.png?resizew=164)
(1)求
的度数;(2)求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fcafd4e3c295eed2ab9c92c3d4a36b.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/a76ffd241623ec4ee9fd08876464def3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4c45608fd88469bd0d29aaacb20fe2.png)
![](https://img.xkw.com/dksih/QBM/2019/5/5/2197165370318848/2197701810364416/STEM/ba635340d5f2435cbf9b2d1dda673bad.png?resizew=164)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7316430d26a6f4bcc0bdadfd1a5330a.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在长方形
中,
,
,现将该长方形沿对角线
折叠,使点
落在对点
处,
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8f21641c-6bf1-4902-81b2-925a8fcd6e59.png?resizew=156)
(1)试说明
;
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8f21641c-6bf1-4902-81b2-925a8fcd6e59.png?resizew=156)
(1)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076a5273440d800b96bfcaaa9970cc45.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,AB,AC是等腰三角形ABC的两腰,AD平分∠BAC,则△BCD是等腰三角形吗?试说明理由.
![](https://img.xkw.com/dksih/QBM/2017/10/24/1802245225840640/1804423301169153/STEM/afc350a37aa447c78ce66e8d93c61057.png?resizew=86)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】已知:如图,在四边形
中,
,点E是
的中点,连接
、BD、DE.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/c99b14a1-8b67-4324-a63d-4167f3ad268e.png?resizew=158)
(1)求证:
是等腰三角形;
(2)当
______时,
是等边三角形.并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3798a74058ec4bc40b6d9b5d268c359b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/c99b14a1-8b67-4324-a63d-4167f3ad268e.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0c46783b77cce2bd4b45b9acc61884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在
中,
,请用尺规作图法在AB上求作一点P,使得
.(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ad69747b05ac67f632dcf0414d7f3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/e8eea993-a348-4f2e-ad51-671c6450d499.png?resizew=144)
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
的两条直径,弦
于点
,
,
的延长线交于点
,连结
.
![](https://img.xkw.com/dksih/QBM/2022/11/7/3104502830530560/3147606745931776/STEM/714c3de5644e4f5ea87f59465070c58d.png?resizew=164)
(1)求证:
;
(2)若
,
,求
的长.
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2022/11/7/3104502830530560/3147606745931776/STEM/714c3de5644e4f5ea87f59465070c58d.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d964cc13e4982ec41473ae98fbc9d440.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef520a2657abdf14fa6818c380b596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abb7feba3d55eec06e4f29515695943a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
您最近一年使用:0次