如图1,已知
,
,
是
内部的一条射线,且
平分
.
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399472824598528/2399728278675456/STEM/30b4d192a5954b7e8b11cd505fc182f8.png?resizew=503)
(1)若
,则
;
(2)若
在
内部且
,则
;
(3)若
,求
的度数(用含
的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562029a2608b59d81e7e93ad3b5aee81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d718ad993775e472b4fd7808e4cf50d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399472824598528/2399728278675456/STEM/30b4d192a5954b7e8b11cd505fc182f8.png?resizew=503)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13747ac661733e00de1b3d3e96b60703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac531260d402dae49cb801a514fce6a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3de1c5bfefe6130c058a3b92eb3cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0366cb182090fac1a4aa02ffb889207b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033c256a32d6f8b0b6eccb2f730f247d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2460507a462453e084eaf70a7d867e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
更新时间:2020-02-15 20:42:35
|
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
【推荐1】已知:如图,直线
与直线
交点O,
,
平分
.
平分
;
(2)如图2,
,在直线
的下方,若
平分
,
平分
,
,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/6469f4cabb86bfe3bdbc4fb4f30d1130.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/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/843adec8fba1741ccb81a9017cfb815f.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ca61ca1e97ee64761bc30272a013bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79bc313f73ba34b49cf9fd322d8835e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5872ef44ce364d04622e28e1d6f9e39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fd374f0ef37bd8fad834961f7fdd8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c1a42726b1742434335801bf4076a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】如图所示,OA,OB,OC是以直线EF上一点O为端点的三条射线,且
,
,
,以点O为端点作射线OP,OQ分别与射线OF,OC重合.射线OP从OF处开始绕点O逆时针匀速旋转,转速为
,射线OQ从OC处开始绕点O顺时针匀速旋转,(射线OQ旋转至与射线OF重合时停止),两条射线同时开始旋转、(旋转速度=旋转角度
旋转时间)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5b8867cd-7207-40c1-983c-273044c8226f.png?resizew=169)
(1)当射线OP平分
时,求它旋转的时间.
(2)若射线OQ的转速为
,请求出当
时,射线OP旋转的时间.
(3)若
当时,射线OQ旋转到的位置恰好将
分成度数比为1:2的两个角,求此时射线OQ的旋转速度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8940b8beac56782ffb766c38a9e01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25aff6459b42a3451cacd41f0200ecb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a74e7b4f127bac735a77c850c095c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09052719a6d55df23d74d8e3956257ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5b8867cd-7207-40c1-983c-273044c8226f.png?resizew=169)
(1)当射线OP平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
(2)若射线OQ的转速为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bec241b2be7baba8e8185c33760a648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ef81db8d8d365016c12ce751959453.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7f0fc7c53300cc00d569438abd278c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
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