如图,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/829cd8b5-fcc5-414c-a57f-94a1962f10bf.png?resizew=205)
(1)求证:
;
(2)若
,试探索:
,
,
的数量关系;
(3)在(2)的条件下,若
,
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53774b6c1c3d95ca04e3c2dc454ba7a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/829cd8b5-fcc5-414c-a57f-94a1962f10bf.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdef71cad864f147d806fa9d5a6b257.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0864044fa570bfc9c8aebe0d5d29b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274e29821dd4630a7182573b7c654f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a470bad30b85e31e120e46942cd30e9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc5005d2af8b895364f3356bbee10abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13ae849142a1bd9534b72723c8d1b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e03817b74717604ceddcbe585ef26db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
21-22七年级下·湖北宜昌·期中 查看更多[3]
湖北省宜昌市第九中学2021-2022学年七年级下学期期中考试数学试题(已下线)7.4 平行线的性质-2022-2023学年八年级数学上册课后培优分级练(北师大版)(已下线)专题10 证明(考点串讲+八大类型)-2022-2023学年七年级数学下学期期中期末考点大串讲(苏科版)
更新时间:2022-09-13 10:15:55
|
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解答题-问答题
|
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【推荐1】我们把有一组对顶角的两个三角形组成的图形叫做“8”字图形,如图1,
,
相交于点
,连接
,
得到“8”字图形
.
的理由;
(2)如图2,
和
的平分线相交于点E,利用(1)中的结论探索
与
、
间的关系;
(3)如图3,点
为
延长线上一点,
、
分别是
、
的四等分线,且
,
,
的延长线与
交于点
,请探索
与
、
的关系.(直接写结论)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6436b9c2493203d008064460c3c487.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1706e1621047030640b450b2f29a19ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c282e4010cb946b079ffeca77aa6f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
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【推荐2】如图,四边形ABCD和四边形CEFG都是正方形,且BC=CD,CE=CG,∠BCD=∠GCE=90°.
(1)求证:△BCG≌△DCE;
(2)求证:BG⊥DE.
(1)求证:△BCG≌△DCE;
(2)求证:BG⊥DE.
![](https://img.xkw.com/dksih/QBM/2020/3/20/2423492296654848/2424124254953472/STEM/31c8141125c042ee8ddbed91b0077161.png?resizew=183)
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名校
【推荐1】如图,在
中,
,
是
的中点。在射线
上任意取一点
,连接
,将线段
绕点
逆时针方向旋转80°,点
的对应点是点
,连接
.
(1)如图1,当点
落在射线
上时,
①
_________________°;
②直线
与直线
的位置关系是______________________。
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364171071315968/2367065837338624/STEM/4991ef49027941508bad9c28e572735e.png?resizew=208)
(2)如图2,当点
落在射线
的左侧时,试判断直线
与直线
的位置关系,并证明你的结论。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283d07f2fafe79c207a20d40193e2516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3797a759dca7272c4f8a2434423ff.png)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62c64a9822fed4a36bbeca730b28530.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364171071315968/2367065837338624/STEM/4991ef49027941508bad9c28e572735e.png?resizew=208)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2019/12/27/2364171071315968/2367065837338624/STEM/501e557879b34081be2198866ee7c394.png?resizew=225)
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【推荐2】已知:点
在直线
上,点
都在直线
上(点
在点
的左侧),连接
,
,
平分
,且
.
;
(2)如图2,点
为线段
上一动点,连接
,且始终满足
.
①当
时,在直线
上取点
,连接
,使得
,求此时
的度数;
②在点
的运动过程中,
与
的度数之比是否为定值,若是,求出这个值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9285d2f630ff8a4c58ff3504fee334ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7717a9082cde8222822af78b4300e969.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5527455ae8a2ff9a00a76c41659a2e4.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14799d3aa76b2c190d9fc58c6fc3e8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97223e7c3ff2c78bdedae87a8ba66112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9f28bd749980fd789988bb99d5fc8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fdee9d60646d0052c0893d3d31d1682.png)
②在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07d6f1b7b75c50f767f2e5886756832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6344778ed1e75c1a99e2268468081867.png)
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【推荐1】如图,直线
,点E、F分别是
、
上的动点(点E在点F的右侧),点M为线段
上的一点,点N为射线
上的一点,连接
且
.
(1)如图1,若
,则
______;
(2)如图2,连接
,且
恰好平分
,
,求
的度数;
(3)过点M作
于H,G在射线
上,连接
,
,若
平分
,
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851b5e53821ac0601c61a1dd694b3904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/83bfe8ac-a0ec-4a23-a437-c84fe36439ea.png?resizew=574)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c748d0a96e396294b52f5f642b7743ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099c18972ca04d4d0863af7b134264df.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5c824635ae814fb6194e8a3b6e488f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960d4d3cd69e475498d79345edcbf926.png)
(3)过点M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cbee40875112b88b7adcdcb297220f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9af92a48d382a3896f2f50a9937e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00195f7190aefdb34f4270a3b7ea453d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9201c45d527d4e983282c653fca8e7bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6d0564be83500c8cd9d1211cf686e3.png)
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【推荐2】如图,四边形
中,
,
,
,点P是对角线
上的一动点(不与点A,C重合),过点
作
,
,分别交
,
于点E,F,连接
.
(1)求
的度数;
(2)设
,
,随着点
的运动,
的值是否会发生变化?若变化,请求出它的变化范围;若不变,请求出它的值;
(3)求
的取值范围(可直接写出最后结果).
【参考材料】
对于“已知
,求
的最大值”这个问题,我们可以采取如下两种思路:
【方法一】
①转化:要求
的最大值,只需先求
的最大值;
②消元:显然,
,所以,
;
③整体观:把两变量x,y的乘积,看作一个整体变量,可设
,则
,问题转化为求
的最大值;
④化归:显然,
是
的二次函数,这已是熟悉的问题.
【方法二】
由
,可得,
,
所以,
,(等号成立的条件是
)
所以,
的最大值为1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cedd4928cf0cca80e127eb78de6957f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527d1fbed4fb40511abbdf196c9ba575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685fff9df3ac7caff2001882941a3d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76a1e2531e2ae0201545eca2e4570a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/0c924c95-3515-4e04-8bc8-fa7a7a457dbf.png?resizew=502)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ea697b36a26ecc0df0bc2af8844b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9430ed2758fa65bf69511aaff14d9b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016617e412593eb6114e8c991d08f448.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
【参考材料】
对于“已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b2a0156d4ff11f7b9c7db9a1c63356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427e880a7289fe39b352a2ec425f7405.png)
【方法一】
①转化:要求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427e880a7289fe39b352a2ec425f7405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
②消元:显然,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d33de73c544db435e1d65d1df1731ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf67f50d8298545e8bee3b14b3011e1.png)
③整体观:把两变量x,y的乘积,看作一个整体变量,可设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72eb7e85b7db6af1b33ffe8c729078a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a350c8cebb7020be358cd0a189def85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
④化归:显然,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
【方法二】
由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f128c01c697f7bc00988425f95c5aab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3d79e354cf1cf6c5bb0d043b68d07a.png)
所以,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d18f7139bfbae1cf4971d505a83618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24efa543736b9064b2abe9d35a46308.png)
所以,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427e880a7289fe39b352a2ec425f7405.png)
您最近一年使用:0次
【推荐1】如图1,已知
和
都是等边三角形,且点E在线段AB上.
(1)过点E作
交AC于点G,试判断
的形状并说明理由;
(2)求证:
;
(3)如图2,若点D在射线CA上,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5a0a6e5b3f489a7032ea5116c96024.png)
(1)过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eedfb7e187720b35504d90fc0b59ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00870385ca7f3214e2971779eb4c7904.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da81b8a99d67f8e9ab147a32cd57886.png)
(3)如图2,若点D在射线CA上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f9a3935cd124d021c7b18b0f634915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2951d28e8cc3fa80372c39c51b60d6.png)
![](https://img.xkw.com/dksih/QBM/2020/11/4/2585827902636032/2588079307489280/STEM/99ab06721340431f8b0224ce9ee3259f.png?resizew=276)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图1,
,点E,F在
上,点G在
上,点P在
之间,连接
.
;
(2)如图2,
平分
交
于点N,
,
平分
,
,求
的度数;
(3)如图3,
平分
交
于点N,
,
平分
,
平分
,
交于点M,
,
,直接写出x : y的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.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/bdcf86f7cf381c563ad80af86feeed83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8724154dec48ba6289f510878d6310ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0529feace64172d37bf9faa1e30333f.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482e68d608de7675e15bb759acd8204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca23db2faa7ffe00ed4852083d9176f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d4ab4f05dbd1a4301ed0dc4c73aa75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593d873ef1e8fca5f01b63c03be39199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df416efbf00259c3b1090cf15c726bdc.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482e68d608de7675e15bb759acd8204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca23db2faa7ffe00ed4852083d9176f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d4ab4f05dbd1a4301ed0dc4c73aa75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f80fcc149502f668d1d4aa8c0997b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730d5555abae30924e87bac667e0a3cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d29d31ecab034493ff6ac89b508142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012f3e0009f4ff709e5eabfb5db0d376.png)
您最近一年使用:0次