如图,
和
分别是
的余角和补角,且
是
的平分线,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
更新时间:2022-03-14 16:21:19
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适中
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名校
【推荐1】如图,在
中,
,点E是
的中点,动点P从点A出发,以每秒2个单位长度的速度沿A→C→B运动.到点B停止.若设点P运动的时间是t秒(t>0).
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146306751021056/3148505553469440/STEM/46a3ba90d2264444a6adaf9ebacada24.png?resizew=133)
(1)点P到达点C时,t= 秒;点P到达点B时.t= 秒.
(2)当线段
长度为2时,求t的值;
(3)当点P在线段
上运动时,求线段
的长度(用含t的代数式表示)(
);
(4)当
的面积等于10时,直接写出t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c13bab1b29ecdcc26050966c4c16a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146306751021056/3148505553469440/STEM/46a3ba90d2264444a6adaf9ebacada24.png?resizew=133)
(1)点P到达点C时,t= 秒;点P到达点B时.t= 秒.
(2)当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)当点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898f80b7262a74bd5271d096fd3aa67c.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
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【推荐2】已知数轴上
三点对应的数分别为
且满足
,动点
从
出发,以每秒1个单位的速度向终点
移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/87ac9bf4-97be-427b-bbfa-1021a1a950f7.png?resizew=364)
(1)求
的值;
(2)当
到
的距离为
点到
点距离的一半时,求
的运动时间;
(3)当
运动到
时,动点
从
点出发,以每秒3个单位的速度向终点
移动,当一个点到达终点时,另一个点也随之停止运动,若
的距离为2个单位长度时,请直接写出
的运动时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbacb72cb9c65fc5be340a8e4a3f22d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/87ac9bf4-97be-427b-bbfa-1021a1a950f7.png?resizew=364)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/dad2a36927223bd70f426ba06aea4b45.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解答题-问答题
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(0.65)
【推荐1】已知点O为直线
上一点,将直角三角板
如图所示放置,且直角顶点在O处,在
内部作射线
,且
恰好平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/9d0b23b8-c6c1-4654-992f-92a87cfe3dd7.png?resizew=148)
(1)若
,求
的度数;
(2)若
,求
的度数;
(3)试猜想
与
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1eb76f88cb973c220cffa1c9c0721a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77603496a315e39db671c0c1e4256cc5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/9d0b23b8-c6c1-4654-992f-92a87cfe3dd7.png?resizew=148)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644c369181c5f65869e15893c22f1e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f547d9cbdf2396394d1a2df1bdc89382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
(3)试猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a89a0850a156bef223fba4d9609156.png)
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(0.65)
【推荐2】点O为直线
上一点,过点O作射线
,使
,一直角三角板的直角顶点放在点O处.
(1)如图1,将三角板
的一边
与射线
重合时,则
______
;
(2)如图2,将图1中的三角板
绕点O逆时针旋转一定角度,当
恰好是
的角平分线时,求
的度数;
(3)将图1中的三角尺
绕点O逆时针旋转
的过程中,设旋转的角度为
度,在旋转的过程中,能否使
?若能,求出的度数;若不能,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94438615778d57a6363a92be3679c05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/bc644ccd-74bf-4283-aae6-21efa8e0c672.png?resizew=408)
(1)如图1,将三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45739116f428f7c6c5964de72a1fa101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
(2)如图2,将图1中的三角板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
(3)将图1中的三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3711e331195e55e1c0133b0286d61a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab82354eacaaea15db9d2f187f941456.png)
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