如图1,点O在直线
上,射线
、
在直线
上方,
,
.
(1)若
,请说明射线
是
的角平分线;
(2)射线
在直线
上方,
平分
,
,
①当
时,求
的度数
②当
时,是否存在常数k使得
的值为定值?若存在,请求出常数k的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0975b70e69b9d9f09bf6696d3d5fc3c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff9b01b96f2d418ad30fe8adec70ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/0cfedd7f-7e14-4b32-9fc3-ff6f85e0dc78.png?resizew=410)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281c26fc584f9bef0bb2f94a4d95b879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9de708d1544ebe0b82e7e6e2102382.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588abe296d53dbbce91d0c693322bf8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d59a30b6f868b84a7f2a7eb8ad2b926.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6df3c39f6faaf6235fbc62041a3d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cf7633fe1cf4a393c17d56d8683dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5415d4ce8be323591f0ab66e2441e6d.png)
更新时间:2024-02-26 09:50:39
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名校
【推荐1】如图1,在数轴上A点表示数a,B点表示数b,
表示A点和B点之间的距离,且a、b满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/842a4535-ef11-4fa4-9478-b99aed746064.png?resizew=493)
(1)A、B两点之间的距离
;
(2)若在数轴上存在一点C,且
,求C点表示的数;
(3)如图2,若在原点O处及B处各放一挡板,甲、乙两球同时从A、B两处分别以4个单位/秒,2个单位/秒的速度向左运动;乙球每次碰到挡板后(忽略球的大小,可看作一点)均以原来速度向相反方向运动,甲球在乙球第一次碰到挡板后,以3个单位/秒的速度向相反方向运动直至碰到挡板,此时两球同时停止运动,设甲球运动的时间为t(秒),当其中一球到原点距离是另一球到原点距离的3倍时,求此时乙球所在位置对应的数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7871daa5f0611d7163dc4aa431efa379.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/842a4535-ef11-4fa4-9478-b99aed746064.png?resizew=493)
(1)A、B两点之间的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(2)若在数轴上存在一点C,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3976d08e5f9e24e76ce9579c06a8dc.png)
(3)如图2,若在原点O处及B处各放一挡板,甲、乙两球同时从A、B两处分别以4个单位/秒,2个单位/秒的速度向左运动;乙球每次碰到挡板后(忽略球的大小,可看作一点)均以原来速度向相反方向运动,甲球在乙球第一次碰到挡板后,以3个单位/秒的速度向相反方向运动直至碰到挡板,此时两球同时停止运动,设甲球运动的时间为t(秒),当其中一球到原点距离是另一球到原点距离的3倍时,求此时乙球所在位置对应的数.
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【推荐2】点A对应数a,点B对应数b,点C对应数c,
xc﹣5y与﹣2xb+15y的和是﹣6x5y.
(1)那么a= ,b= ,c= ;
(2)点P为数轴上一点,且满足PA=3PB+1,请求出点P所表示的数;
(3)点M为数轴上点A右侧一点,甲、乙两点分别从A、M出发,相向而行,2分钟后在途中相遇,相遇后,两点的速度都提高了1单位长度/分,当甲到达M点后立刻按原路向A返行,当乙到达A点后也立刻按原路向M点返行.甲、乙两点在第一次相遇后3分36秒又再次相遇,则A、M两点的距离是 单位长度;
(4)当甲以4单位长度/分的速度从A出发,向右运动,乙同时从点C出发,以6单位长度/分的速度向左运动,当甲到A、B、C的距离之和为40个单位长度时,假如甲立即掉头返行,请问甲、乙还能碰面吗?若能,求出碰面的地点对应的数;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90751eebae0fc4350d122e3cdbef119f.png)
(1)那么a= ,b= ,c= ;
(2)点P为数轴上一点,且满足PA=3PB+1,请求出点P所表示的数;
(3)点M为数轴上点A右侧一点,甲、乙两点分别从A、M出发,相向而行,2分钟后在途中相遇,相遇后,两点的速度都提高了1单位长度/分,当甲到达M点后立刻按原路向A返行,当乙到达A点后也立刻按原路向M点返行.甲、乙两点在第一次相遇后3分36秒又再次相遇,则A、M两点的距离是 单位长度;
(4)当甲以4单位长度/分的速度从A出发,向右运动,乙同时从点C出发,以6单位长度/分的速度向左运动,当甲到A、B、C的距离之和为40个单位长度时,假如甲立即掉头返行,请问甲、乙还能碰面吗?若能,求出碰面的地点对应的数;若不能,请说明理由.
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【推荐1】新定文:从一个角的顶点出发,在角的内部引两条射线,如果这两条射线所成的角等于这个角的一半,那么这两条射线所成的角叫做这个角的内半角.
如图1,若射线
、
在
的内部,且
,则
是
的内半角.
根据以上信息,解决下面的问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/5ba6bd9f-c03a-411b-85fa-38c643e02aa6.png?resizew=512)
(1)如图1,
,
,若
是
的内半角,则
________
;
(2)如图2,已知
,将
绕点
按顺时针方向旋转一个角度
(
)至
.若
是
的内半角,求
的值;
(3)如图3,已知
,把三角板
如图3放置(
),
、
分别以
和
按照顺时针方向转动一周,当射线
、
、
、
构成内半角时,直接写出
的值.
如图1,若射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993aafb6b40451d22a549a6ddca9ddf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
根据以上信息,解决下面的问题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518b0724ddd37dca10465091ac6db651.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/5ba6bd9f-c03a-411b-85fa-38c643e02aa6.png?resizew=512)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18c7dc38750d0e1787adee0055543d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b21f129dc4cdfe6b98f58f2ecc26cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35b6af1d4f447760a2dc8b10a9e9afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5df59dbf1248622df0a5bade4b30fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8052651082b1215593dafbf10e72b837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53414c77a829656ec7d1c561fa82e6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1755c4b405b86d30c1806a598e063b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】如图,O为直线
上一点,将一副直角三角尺的两个直角顶点叠合在O处,其中一个直角三角尺的另一顶点落在直线
上的B点.
(1)如图1,若
,求
的度数;
(2)将直角三角尺
从图1的位置绕O点逆时针方向旋转
,若
,求
的度数;
(3)将直角三角尺
从如图2的位置绕O点逆时针方向旋转一周,射线
在
内,射线
在
内,且
,
,在转动过程中某个位置测得
,则
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/af5ee89c-6a79-4993-b0f6-05aa77ae92d7.png?resizew=650)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72dbe710cca6662be5cc0c26a0d12a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea7b811fa609b8e92da877471564e07.png)
(2)将直角三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f6a9fcd59fc2476fc307fa8a3a9250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79054ea7bc16f74c88ae6b7e915ebbe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48e0180b88fd2e121ff20b4d8af54bec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea7b811fa609b8e92da877471564e07.png)
(3)将直角三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f6a9fcd59fc2476fc307fa8a3a9250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9a1453c2aa07029949e715ec56821d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7508c8bf1be64bb53a997fd551000905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aabfa428a4a7c31db9a9225ab83fc2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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【推荐1】已知:直线
,
,点
为平面上一点,连接
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/76461d98-fd07-44bd-a9a3-7b36c6826abf.png?resizew=415)
(1)如图1,当点
在直线
,
之间时,有
;
①求证:
;
②如图2,若
与
的平分线相交于点
,试写出
与
之间的数量关系,并说明理由.
(2)若
,点
,
的位置如图3所示,连接
,
,
,
,则
与
有何数量关系?请直接 写出结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/76461d98-fd07-44bd-a9a3-7b36c6826abf.png?resizew=415)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/391dadd4059bc613d13b21cf53b38607.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
②如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48771358b76e240743bb49c497ef7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf7cc67acfa50ef6b21d9aa379e604a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66efb2e5b7aa63e8561be256d691fc88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b94c00fcddebf636e3cfcf60c96daf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6cc5ba14af7e9e926134b12d2ca648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66efb2e5b7aa63e8561be256d691fc88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
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【推荐2】如图1,已知AB∥CD,BE平分∠ABD,DE平分∠BDC.
(1)求证:∠BED=90°;
(2)如图2,延长BE交CD于点H,点F为线段EH上一动点,∠EDF=α,∠ABF的角平分线与∠CDF的角平分线DG交于点G,试用含α的式子表示∠BGD的大小;
(3)如图3,延长BE交CD于点H,点F为线段EH上一动点,∠EBM的角平分线与∠FDN的角平分线交于点G,探究∠BGD与∠BFD之间的数量关系,请直接写出结论: .
(1)求证:∠BED=90°;
(2)如图2,延长BE交CD于点H,点F为线段EH上一动点,∠EDF=α,∠ABF的角平分线与∠CDF的角平分线DG交于点G,试用含α的式子表示∠BGD的大小;
(3)如图3,延长BE交CD于点H,点F为线段EH上一动点,∠EBM的角平分线与∠FDN的角平分线交于点G,探究∠BGD与∠BFD之间的数量关系,请直接写出结论: .
![](https://img.xkw.com/dksih/QBM/2021/8/21/2790672173580288/2791214315347968/STEM/8878bf56b0504e6d9739ff9317ddf6e4.png?resizew=543)
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