如图,直线
相交于点
,
,垂足为
.
(1)若
,求
的度数;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23162d8d2a833da1843f0442a2534be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/16889ed2-9db7-4ddb-bece-c3e138f9407c.png?resizew=162)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28dfc48cfb4f5112cc6c5ac6d0fb7d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47445d93001b1e1caf0a90246cc18c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15886bb1365d039d8e4450cae287788d.png)
更新时间:2023-07-09 22:07:33
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,点
为原点,
、
为数轴上两点,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/b798f59c-6cf9-4f7a-957c-83d2c94e7193.png?resizew=186)
(1)
、
对应的数分别为______、______;
(2)点
、
分别以4个单位/秒和3个单位/秒的速度同时向右运动,点
从原点
以7个单位/秒的速度向右运动,是否存在常数
,使得
为定值,若存在请求出
值以及这个定值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd90bfa2987b84df430498021d5f648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffaf4c2d58403f472640715561bd53b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/b798f59c-6cf9-4f7a-957c-83d2c94e7193.png?resizew=186)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7231b50797dd2d4e3252e7bebd8f1d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
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【推荐2】如图,直线
相交于点O,
分别在
和
内部,
平分
.
,
,求
的度数;
(2)若
平分
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8163aaa40962f5d8741e9a119688b1c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843adec8fba1741ccb81a9017cfb815f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bd1e7b714fb59db1372265518d8e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b23482ca419f4f3c44698365e248f2bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb7431d706c99657458dc4d996c8bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
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解答题-问答题
|
较易
(0.85)
【推荐1】如图,直线
相交于点O,
,
是
的平分线,
是
的反向延长线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/2076e6f8-f394-4211-ab13-9960e5e2335c.png?resizew=131)
(1)求
的度数
(2)求
的度数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdcf86f7cf381c563ad80af86feeed83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2515ef8524594ff80ff91155479b3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/2076e6f8-f394-4211-ab13-9960e5e2335c.png?resizew=131)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
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解答题-证明题
|
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【推荐2】完成下面的证明过程,并在括号内填写理由.
如图,
平分
,点
在
上,点
在
上,
与
相交于点
,
,试说明
.
证明:因为
平分
,
所以
______(角平分线的定义),
又因为
(已知),
所以,
(______),
所以
(______),
所以
______
(______),
又因为
(______),
所以
.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/862730f28c12750ebea0af5edcac5fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926e1a6fd573c2cce3aae4d0a83302c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/5/01b29738-a1f5-4376-8ef4-1b9acefbc837.png?resizew=166)
证明:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d715af2d0f55f1f8855361afee3fd0f.png)
又因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
所以,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4631adb39d510d28f38c96a50e466d4.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e09a0eee783c55663979f1c6320fcf8.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7946fa2f996afdf647f065f0d5591888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e519cdb0cac3981d8e9610dba507a3.png)
又因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78f1b6167722874289d00d4216a1300.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926e1a6fd573c2cce3aae4d0a83302c4.png)
您最近一年使用:0次