如图,直线
与
相交于点O,
,
平分
,若
,求
和
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bb2d945b7908ebac080e6595d4895f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2f7bab4ed36ec5d04db3aeed2796f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cde1fda25d47bd302eed6ee72f09596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd0dc942dc5a587e3c638df0d42c76b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/6/979de787-ec4a-4923-8f74-c8238534f9f0.png?resizew=172)
更新时间:2023-09-05 12:35:37
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】在
中,
的平分线与
的外角
的平分线交于点E.
(1)如图①,若
,则
________;如图②,若
,则
_______;如图③,若
,则
________;
(2)根据以上求解的过程,你发现
与
之间有什么关系?如果有,写出你的发现过程;如果没有,请说明理由(借助图①).
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/7fac4b30-6e02-459d-b899-1d9804202d34.png?resizew=375)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e702e136211878dce558e0457f15df63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b83764876be47a196fd5f408763738a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b83764876be47a196fd5f408763738a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabd5ad58dd8d85ad8e30111e76e2066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b83764876be47a196fd5f408763738a.png)
(2)根据以上求解的过程,你发现
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
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【推荐2】如图1,点O为直线AB上一点,过点O作射线OC,使
.将一直角三角板的直角顶点放在点O处(
),一边OM在射线OB上,另一边ON在直线AB的下方.
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947478563545088/2949261466664960/STEM/21977da4-933c-4b2d-a468-19e207fb54f2.png?resizew=495)
(1)将图1中的三角板绕点O逆时针旋转至图2,使边OM在
的内部,且恰好平分
.求
的度数;
(2)将图1中的三角板绕点O以每秒5°的速度沿逆时针方向旋转一周,在旋转的过程中,第t秒时,直线ON恰好平分锐角
,直接写出t的值;
(3)将图1中的三角板绕点O顺时针旋转至图3,使ON在
的内部,请直接写出
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbb6a70dd29662017ca458e43b7dd777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de025af623e291546d809da85beb334.png)
![](https://img.xkw.com/dksih/QBM/2022/3/30/2947478563545088/2949261466664960/STEM/21977da4-933c-4b2d-a468-19e207fb54f2.png?resizew=495)
(1)将图1中的三角板绕点O逆时针旋转至图2,使边OM在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2f7bab4ed36ec5d04db3aeed2796f2.png)
(2)将图1中的三角板绕点O以每秒5°的速度沿逆时针方向旋转一周,在旋转的过程中,第t秒时,直线ON恰好平分锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
(3)将图1中的三角板绕点O顺时针旋转至图3,使ON在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a89a0850a156bef223fba4d9609156.png)
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名校
【推荐2】如图,在
中,
,点
为
的边
上一点,过点
作
交
于点
,过点
作
交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/89e9da18-83ea-476c-be3b-fef1976b4474.png?resizew=177)
(1)求
的度数;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedf634c305704c1c13cb0353d5dc7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/89e9da18-83ea-476c-be3b-fef1976b4474.png?resizew=177)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785582cfe7683bbe285bd57bc2fea534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
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适中
(0.65)
【推荐1】根据要求画图,并回答问题.
已知:直线AB,CD相交于点O,且OE⊥AB.
(1)过点O画直线MN⊥CD;
(2)若点F是(1)中所画直线MN上任意一点(O点除外),若∠AOC=35°,求∠EOF的度数.
已知:直线AB,CD相交于点O,且OE⊥AB.
(1)过点O画直线MN⊥CD;
(2)若点F是(1)中所画直线MN上任意一点(O点除外),若∠AOC=35°,求∠EOF的度数.
![](https://img.xkw.com/dksih/QBM/2018/12/26/2105211238154240/2107891562758144/STEM/75cd87bdd4bb456c9e588b3e7f88f725.png?resizew=197)
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【推荐2】如图所示,直线AB、CD相交于点O,∠DOE=∠BOD,OF平分∠AOE,若∠AOC=28°,求∠EOF的度数.
![](https://img.xkw.com/dksih/QBM/2018/2/12/1880535140507648/1880885367660544/STEM/2dcfe42612254c65a99a83a731f8713c.png?resizew=118)
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