已知射线
射线CD,P为一动点,AE平分
,CE平分
,且AE与CE相交于点E.(注意:此题不允许使用三角形,四边形内角和进行解答)
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694784306487296/2702322775818240/STEM/40e311ea-6bee-44a0-af4b-0a75d03f873f.png)
(1)在图1中,当点P运动到线段AC上时,
.直接写出
的度数;
(2)当点P运动到图2的位置时,猜想
与
之间的关系,并加以说明;
(3)当点P运动到图3的位置时,(2)中的结论是否还成立?若成立,请说明理由:若不成立,请写出
与
之间的关系,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bafaec1cbb31d644a0df6bbd4fe4f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d221944148d71e2e1bc76040aefb8d.png)
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694784306487296/2702322775818240/STEM/40e311ea-6bee-44a0-af4b-0a75d03f873f.png)
(1)在图1中,当点P运动到线段AC上时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23364e84b4e70e8042ed96aca41f870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
(2)当点P运动到图2的位置时,猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
(3)当点P运动到图3的位置时,(2)中的结论是否还成立?若成立,请说明理由:若不成立,请写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3c1375c64dceef45846308a418cf7f.png)
更新时间:2021-04-18 09:12:40
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在
中,
,
,点
是边
上的动点(点
不与点
重合),以
为斜边在直线
上方作等腰直角三角形
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/3b1f6f8a-bdf0-41a6-81ad-d20bbe038444.png?resizew=374)
(1)当点
是边
的中点时,求
的值;
(2)
,点
在边
上运动的过程中,
的大小是否变化?如果变化,请说明理由;如果不变,请求出
的大小;
(3)设
与
的交点为
,点
是边
上的一点,且
,如果点
到直线
的距离等于线段
的长度,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2e679d7b314ff58c284da08e8edbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/3b1f6f8a-bdf0-41a6-81ad-d20bbe038444.png?resizew=374)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e4c6296ca3ede65aa460dec0254be4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6344778ed1e75c1a99e2268468081867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6344778ed1e75c1a99e2268468081867.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39e6b7fc74a1ef7341ab4d4ca88b54a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,已知射线
,
,
,
在射线
上,且满足
,
平分
.
(1)若平行移动
,那么
的值是否随之发生变化?若变化,找出变化规律;若不变,求出这个比值.
(2)在平移的过程中,
与
满足怎样的数量关系?请说明理由.
(3)若将题中条件改为“
,
在射线
的反向延长线上”,其余条件均不变,请对应的图形,标上字母,并直接写出此时
与
所满足的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e415e0fc8f94a77e838670f764f132c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5409045270d790e3471f370f91ce8674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2044b4ec4ff06f0f2f148aa6f3d6f999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b723421b10b3735be77e1c79fa1425.png)
(1)若平行移动
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cd508a14ebe03d869bcbe80c21dc84.png)
(2)在平移的过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc30901a255fc967e88734abfee8147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
(3)若将题中条件改为“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc30901a255fc967e88734abfee8147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
![](https://img.xkw.com/dksih/QBM/2020/5/27/2471792869605376/2472294782558208/STEM/3bd53a2e8bf04867b2a8be559744db7c.png?resizew=243)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,直线
中
的边
与直线m相交于D、E两点,边
与直线n交于F、G两点.
(1)将
如图1位置摆放,如果
,则
______;
(2)将
如图2位置摆放,H为
上一点,
,请写出
与
之间的数量关系,并说明理由;
(3)将
如图3位置摆放,若
,延长
交直线n于点K,点P是射线
上一动点,探究
与
的数量关系,请直接写出结论(题中的所有角都大于0°小于180°).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e376b2da35c76b91d5a3f5ed9e2b0213.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10d71f318a88b7a077528dfd690e94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f279d402050043751e941f3bd7aaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35bbf1c5259939f288cb0bc65e6ceb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/18/137fe626-d62e-4b12-b850-710cef3df149.png?resizew=557)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ffee3c8ebff6959d893cc2f7f76950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34efc8fadc528fdc4a22469ca27e4cb7.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a014d5ae4ff11a6a11bbebd491242091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547139bcfad65df896be5c87243913bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
(3)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbddef751e1fae035fcb9710a873cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefecdccede08de8b3b83934c8efd40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cfb77ca7b46c78ffec22f74f2842cc.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】小明在学习了“平行线的判定和性质”知识后,对下面问题进行探究:
在平面内,直线AB∥CD,E为平面内一点,连接BE、CE,根据点E的位置探究∠B和∠C、∠BEC的数量关系.
(1)当点E分别在如下图①、图②和图③所示的位置时,请你直接写出三个图形中相应的∠B和∠C、∠BEC的数量关系:
图①中: ;图②中: , 图③中: .
(2)请在以上三个结论中选出一个你喜欢的结论加以证明.
(3)运用上面的结论解决问题:如图④,AB∥CD,BP平分∠ABE,CP平分∠DCE,∠BEC=100°,∠BPC的度数是 .(直接写出结果,不用写计算过程)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/6f2a03b7885c43ebaa4b250c0a2d1c17.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/634bdcc7d5014f8c99af1596d7b86b2e.png?resizew=131)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/aa5f4d32fc11451d959b25c63deb76f1.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/acc07d5bda4844dabcab116c13f401c3.png?resizew=122)
图① 图② 图③ 图④
在平面内,直线AB∥CD,E为平面内一点,连接BE、CE,根据点E的位置探究∠B和∠C、∠BEC的数量关系.
(1)当点E分别在如下图①、图②和图③所示的位置时,请你直接写出三个图形中相应的∠B和∠C、∠BEC的数量关系:
图①中: ;图②中: , 图③中: .
(2)请在以上三个结论中选出一个你喜欢的结论加以证明.
(3)运用上面的结论解决问题:如图④,AB∥CD,BP平分∠ABE,CP平分∠DCE,∠BEC=100°,∠BPC的度数是 .(直接写出结果,不用写计算过程)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/6f2a03b7885c43ebaa4b250c0a2d1c17.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/634bdcc7d5014f8c99af1596d7b86b2e.png?resizew=131)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/aa5f4d32fc11451d959b25c63deb76f1.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940028564914176/1940903122771968/STEM/acc07d5bda4844dabcab116c13f401c3.png?resizew=122)
图① 图② 图③ 图④
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,已知直线
与直线
、
分别相交于点
、
,点
是位于
下方,
上方,
右侧的一点,
.
(1)求证:
;
(2)若
,
分别平分
,
,请在图1中画出点
,并连接
,
.判断
与
是否垂直,并说明理由(不要求尺规作图);
(3)如图2,过
点作
垂直于直线
,交
于点
,点
是射线
上一点,连接
,
,
,作
的角平分线
,交
于点
,点
是
的邻补角平分线上一点,连接
,若
,试判断射线
上是否存在一点
,有
,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1717b5311ed602f1730e86d9322647.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/131400d2-cf11-4b2b-8350-40ed89100ce8.png?resizew=300)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947aed0181a8c0bd81c6ebeba8d1ddc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c35b4fb9ef7d9345043bc3d34af11e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95108f5aa7f7ed0f6e556fb50cdbae98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)如图2,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6a23d521606a35298bbf147f7f830c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76efc8a31d17d84f321ba6e5930ea866.png)
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解答题-问答题
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较难
(0.4)
【推荐2】平行直线AB与CD被直线MN所截.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/3cae54b8-7230-4618-b5b4-1640d4433c30.png?resizew=247)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/5b78fcb8-08bd-4171-89ee-6344b4ef1488.png?resizew=246)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/592d5c74-3873-4b5a-813e-7bcac5960beb.png?resizew=321)
(1)如图1,点E在AB、CD之间的直线MN上,P、Q分别在直线AB、CD上,连接PE、EQ,若∠BPE=160°,∠EQC=30°,求∠PEQ的值;
(2)如图2,点E在AB、CD之间的直线MN上,P、Q分别在直线AB、CD上,连接PE、EQ,PF平分∠BPE、QF平分∠EQD,则∠PEQ和∠PFQ之间有什么数量关系,请写出你的结论并说明理由.
(3)如图3,在(2)的条件下,过P点作PH∥EQ交CD于点H,连接PQ.若PQ平分∠EPH,∠QPF:∠EQF=1:5,求∠PHQ的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/3cae54b8-7230-4618-b5b4-1640d4433c30.png?resizew=247)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/5b78fcb8-08bd-4171-89ee-6344b4ef1488.png?resizew=246)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/592d5c74-3873-4b5a-813e-7bcac5960beb.png?resizew=321)
(1)如图1,点E在AB、CD之间的直线MN上,P、Q分别在直线AB、CD上,连接PE、EQ,若∠BPE=160°,∠EQC=30°,求∠PEQ的值;
(2)如图2,点E在AB、CD之间的直线MN上,P、Q分别在直线AB、CD上,连接PE、EQ,PF平分∠BPE、QF平分∠EQD,则∠PEQ和∠PFQ之间有什么数量关系,请写出你的结论并说明理由.
(3)如图3,在(2)的条件下,过P点作PH∥EQ交CD于点H,连接PQ.若PQ平分∠EPH,∠QPF:∠EQF=1:5,求∠PHQ的度数.
您最近一年使用:0次