如图,直线
,
相交于点O,
平分
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/e53fafcb-cb9e-4242-a80e-ce2734e583be.png?resizew=145)
(1)若
,求
的度数;
(2)若
,求
的度数.
![](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/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebef5bab02280cdc99cc7f689135cd4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/e53fafcb-cb9e-4242-a80e-ce2734e583be.png?resizew=145)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba65f77f40cf01d514d096876207b3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaba1e99cfc99975c43ecfe508e9b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b723421b10b3735be77e1c79fa1425.png)
更新时间:2023-05-05 19:45:25
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
为直线
上一点,
,
平分
,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/cbdbe40f-604b-4c0c-887e-817e26419a52.png?resizew=162)
(1)求出
的度数;
(2)请判断
是否是直角,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36c0d4e38748fbb4a6cf5e700e5e874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/cbdbe40f-604b-4c0c-887e-817e26419a52.png?resizew=162)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
(2)请判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
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【推荐2】将下面的解答过程补充完整(括号内填推理依据)
如图,直线
,
相交于点
,
平分
,
.试说明
.
解:因为
平分
,所以
______,
因为
,所以
,
所以
,
,
所以
________,(________)
因为直线
,
相交于点
,所以
,(______)
所以
.
如图,直线
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caea4e41982e2c5fe0a0c7e73af69c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0eabcbed7fac38e46bc532a19e6fea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/18/ab2f6ec5-f7a7-4f10-9159-2463fc0393b1.png?resizew=154)
解:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4dcd587ee5c1f33464a66322ffa1db5.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caea4e41982e2c5fe0a0c7e73af69c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05867c52c95821d692c2062a2b4d6798.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9458ab67df6e3fe6a0a86763f25c90a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8952c3dfecc0668e1876aebb801becab.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948a57e8e400befe2df53645814e13ec.png)
因为直线
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da02b38bc1ab163a7471711b9b1427e.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c99c46f92e33c22dd9dfd5fbaf2619d2.png)
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解答题-问答题
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适中
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【推荐1】如图,射线OC端点O在直线AB上,
,OE平分
.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897991053172736/2917693944168448/STEM/73d328ba-9d6c-48a9-8cfa-f1b1cf65b700.png?resizew=241)
(1)当
时,求
的度数;
(2)OC与OE有怎样的位置关系?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0565dbe798edb4f8b05cf2899f209c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea7b811fa609b8e92da877471564e07.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897991053172736/2917693944168448/STEM/73d328ba-9d6c-48a9-8cfa-f1b1cf65b700.png?resizew=241)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210d4d13c1050456fda02ed137f6d529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
(2)OC与OE有怎样的位置关系?为什么?
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名校
【推荐2】如图,点O为直线AB与直线CF的交点,
,OD平分
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1dd3c503ff0b4e68f035709e34bc63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95a92fcd0cd5e55f1d32d42504a5690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://img.xkw.com/dksih/QBM/2022/4/9/2954038679183360/2957498614087680/STEM/21d33931-36b5-4f83-a5c6-cca56fab2c57.png?resizew=191)
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