如图1,已知,
是
延长线上一点,射线
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65faae18fc0a592d8076a97ed796e8db.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76b8f5e1f66309514ecbbd507f5776d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c12fe8b47f09f1fcb7b2936576d2c2f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d94adbca9b0bf9bc66ff8829337b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f75f8dbbd0778acd59e16dcb4709f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145c76cd4bc90b864f1d5a7b81462562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0162643a47d631467b45549185e671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac5a910feb156fdf9c9a62821701c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
更新时间:2024-03-27 20:50:27
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,由线段
,
,
,
组成的图形像∑,称为“∑形
”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/3b7a1866-f1cd-4491-a390-2e899ef0f215.png?resizew=525)
(1)如图1,∑形
中,若
,则
_______
;
(2)如图2,连接∑形
中B,D两点,过点A作
,若
,
,用
的值表示
的值,并说明理由;
(3)如图3,已知
,
平分
,
平分
.若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40afe4ad45ffc486e5cfce6f48962b5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/3b7a1866-f1cd-4491-a390-2e899ef0f215.png?resizew=525)
(1)如图1,∑形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40afe4ad45ffc486e5cfce6f48962b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09269af39c61a98e0aef0c13efe1ef01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb985ac5d93b85b6299834627aa95ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)如图2,连接∑形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40afe4ad45ffc486e5cfce6f48962b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0adba493bf7fd59158f255276d72ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6caf69e618ca0137b54b26b82ca6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c61650a2f45c28d0f63abb807307ae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1432005237ada3a91efcdc3a1085b2b8.png)
(3)如图3,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971ef52a8dc3e77a4fc2331f2a1f8439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f68e4414c9ab464bf433385c03705f.png)
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【推荐2】定义:从
的顶点出发,在角的内部作一条射线,若该射线将
分得的两个角中有一个角与
互为补角,则称该射线为
的“好线”.如图,点O在直线
上,
在直线
上方,且
,射线
是
的“好线”.
,且OE在
内部,求
的度数;
(2)若OE恰好平分
,求
的度数;
(3)若OF是
的平分线,OG是
的平分线,直接写出
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0787dcb96404f3064524562c8913ec93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdae1b1c950c86fa1db228b73bffc49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49bdf1dcfe6c344dd2442669e72c44b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4766d41d4df87068908f1bc3d712cd40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f55c6ac896ab4277fae2230a6e10b0.png)
(2)若OE恰好平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
(3)若OF是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb60036876b3c5aa09bb9570e57328b.png)
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解答题-作图题
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较难
(0.4)
【推荐1】已知:直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,点G为直线CD上一定点 ,点E是直线AB上一动点 ,连结EG.在EG的左侧分别作射线EM、GN,两条射线相交于点F,设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/b1bf9b43-2866-4b06-bed6-9a7af6803253.png?resizew=392)
(1)当
,
时,如图1位置所示,求
的度数(用含有
的式子表示),并写出解答过程;
(2)当
时,过点G作EG的垂线
.
①请在图2中补全图形;
②直接 写出直线
与直线CD所夹锐角 的度数______(用含有
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66465535f25462a28bc670e8c3177ca2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/b1bf9b43-2866-4b06-bed6-9a7af6803253.png?resizew=392)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a069462a2ab6ad45273c5f4037c943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0af1b329e6a00b783376db898246729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/600f68bbb24b2f34b6f5ebca90939535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82056fd54f07da22e2f1e444a79e8cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
①请在图2中补全图形;
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】综合与实践
问题情境:数学活动课上,王老师出示了一个问题
直线
,直线
交
,
于
,
两点,点
在直线
上,
平分
, 过点
作
,交
于点
.
(1)如图1,若点
在射线
上,且
,求
的度数;
实践探究:按照要求补全图形,完成探究问题
(2)过点
作
的垂线交射线
于点
.
①如图2,当点
在射线
上,若
,请按照要求补全图形,并直接写出
的度数_________(用含
的式子表示);
②若
的角分线
交直线
于点
,点
在线段
上,请在备用图中探究
与
之间的数量关系,并证明.
问题情境:数学活动课上,王老师出示了一个问题
直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7098c45594103b46e6b57cfc6023e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987db28a819055f9a386783cef091931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/0abcc911-9e83-4558-a9ab-440ea03c2e57.png?resizew=310)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a8cfb3747c454e0698e12857ffae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a711e615da6e131c28a9b4bfd1dbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b4eea854f71c03b451cd3005119f38.png)
实践探究:按照要求补全图形,完成探究问题
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a8cfb3747c454e0698e12857ffae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c7c8b7f2cfa33a8581a4334b07777c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0451d5f19062073196a4b72c3aaf13ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7098c45594103b46e6b57cfc6023e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0451d5f19062073196a4b72c3aaf13ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b4eea854f71c03b451cd3005119f38.png)
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名校
【推荐3】已知:如图①,直线MN⊥直线PQ,垂足为O,点A在射线OP上,点B在射线OQ上(A、B不与O点重合),点C在射线ON上且OC=2,过点C作直线l//PQ,点D在点C的左边且CD=3.
(1)直接写出△BCD的面积.
(2)如图②,若AC⊥BC,作∠CBA的平分线交OC于E,交AC于F,求证:∠CEF=∠CFE.
(3)如图③,若∠ADC=∠DAC,点B在射线OQ上运动,∠ACB的平分线交DA的延长线于点H,在点B运动过程中
的值是否变化?若不变,求出其值;若变化,求出变化范围.
(1)直接写出△BCD的面积.
(2)如图②,若AC⊥BC,作∠CBA的平分线交OC于E,交AC于F,求证:∠CEF=∠CFE.
(3)如图③,若∠ADC=∠DAC,点B在射线OQ上运动,∠ACB的平分线交DA的延长线于点H,在点B运动过程中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d8ed4083d6eb92f3d015f961078606.png)
![](https://img.xkw.com/dksih/QBM/2021/6/10/2740023676977152/2740142735065088/STEM/2982cf98-ef52-44a4-990e-e91d1af7ca1d.png)
您最近一年使用:0次
解答题-证明题
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较难
(0.4)
【推荐1】如图1,已知直线
分别与直线
交于点P和点Q,
,
.
(1)求证:
;
(2)如图2,P,Q两点分别沿直线
和
向左平移相同的单位长度得到E,F两点,点G在直线
上运动,
平分
,点H在直线
上,连接
的延长线交
于点N,
平分
.
①若
,
,求
的大小;
②当点G在
之间时,直接写出
,
,
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb780dea4bb7d09bf3cb08b7258ebbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8410859ee64ee7c8edc35beec6702d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/15a3466b-eebf-4aa4-9691-75c89c1a9cb5.jpg?resizew=165)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/34d9187f-3b56-443d-aad0-9a8839c70f60.jpg?resizew=199)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/387cffcc-39b4-49cb-af78-17b9943a3be6.jpg?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
(2)如图2,P,Q两点分别沿直线
![](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/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482e68d608de7675e15bb759acd8204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf2a89411521f4b31c708117533822f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0576bc456a606969c0a6b9ce29b0e39.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87ac81c2ff93fd20f06217f757dee8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1d5f652f5046a9cf37518058801cb22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0576bc456a606969c0a6b9ce29b0e39.png)
②当点G在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6a524bfcc66c014c632b36424cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d6902c8862bd2616be038549f77aff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb9fc77f75349c3463fea7effa4e225.png)
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解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图,已知直线
射线CD,
.P是射线EB上一动点,过点P作PQ
EC交射线CD于点Q,连接CP.作
,交直线AB于点F,CG平分
.
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716738241961984/2783233384054784/STEM/3107d9c2-d648-4816-9ad4-0ef36da78211.png?resizew=650)
(1)若点P,F,G都在点E的右侧,求
的度数;
(2)若点P,F,G都在点E的右侧,
,求
的度数;
(3)在点P的运动过程中,是否存在这样的情形,使
?若存在,求出
的度数;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5b539eb8f15934cad157e98eeb5e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a2672918211f12449d97e286fe1fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb3748300134501953d6b1c3a905026.png)
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716738241961984/2783233384054784/STEM/3107d9c2-d648-4816-9ad4-0ef36da78211.png?resizew=650)
(1)若点P,F,G都在点E的右侧,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb64034f1bc2b57f4b82afb7ac15c21.png)
(2)若点P,F,G都在点E的右侧,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35b5b92bd8b7b98954159d1d9e6f9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f87c7bb45ab3ace6d77583e00419efd.png)
(3)在点P的运动过程中,是否存在这样的情形,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e89c29c450618cc3692c6770f64cf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f87c7bb45ab3ace6d77583e00419efd.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐1】如图,在△ABC中,BD、CD分别平分∠ABC、∠ACB,点M、N、Q分别在AB、AC、BC的延长线上,BE、CE分别平分∠MBC、∠NCB.
(1)若∠A=60°
①∠BDC的度数为 .
②求∠BEC的度数.
(2)如图,若在∠EBC内部作∠EBF,使
,在∠ECQ内部作∠ECF,使
,则∠BEC和∠BFC有什么样的数量关系?请简述理由.
(1)若∠A=60°
①∠BDC的度数为 .
②求∠BEC的度数.
(2)如图,若在∠EBC内部作∠EBF,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb2ee3e86521b5ef9df42c568baeb75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02643d99ef1eef0dc05a53cc23093825.png)
![](https://img.xkw.com/dksih/QBM/2021/1/22/2641638747529216/2648624043442176/STEM/b93fb534-d091-4e97-b9e6-d16eb6c894d6.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】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/7a5f1641947153c80b987320885a2b57.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/2023/10/6/67cc975b-c81a-477f-ad3b-d6f034e5e83f.png?resizew=356)
(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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25034a7d62d189029b34961d3a2070d6.png)
您最近一年使用:0次