如图7,直线AB∥CD,直线EF分别交直线AB、CD于点E、F,FH平分∠EFD,若∠FEH=110º,求∠EHF的度数.
![](https://img.xkw.com/dksih/QBM/2011/8/22/1573244718415872/1573244768067584/STEM/ccbd54ae6e5145ee9c252b7aefa0fc68.png)
10-11七年级下·安徽安庆·期末 查看更多[3]
更新时间:2016-12-05 03:57:35
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相似题推荐
解答题-作图题
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【推荐1】补全下列解题过程:
如图,OD是∠AOC的平分线,且∠BOC-∠AOB=40°,若∠AOC=120°,求∠BOD的度数.
![](https://img.xkw.com/dksih/QBM/2019/3/11/2115957948571648/2158388760363009/STEM/fa7e9e96d7c74dcdb722d49c198ed021.png?resizew=148)
解:∵OD是∠AOC的平分线,∠AOC=120°
∴∠DOC=
∠_______=______°.
∵∠BOC+∠_____=120°,∠BOC-∠AOB=40°
∴∠BOC=80°
∴∠BOD=∠BOC-∠______=______°
如图,OD是∠AOC的平分线,且∠BOC-∠AOB=40°,若∠AOC=120°,求∠BOD的度数.
![](https://img.xkw.com/dksih/QBM/2019/3/11/2115957948571648/2158388760363009/STEM/fa7e9e96d7c74dcdb722d49c198ed021.png?resizew=148)
解:∵OD是∠AOC的平分线,∠AOC=120°
∴∠DOC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
∵∠BOC+∠_____=120°,∠BOC-∠AOB=40°
∴∠BOC=80°
∴∠BOD=∠BOC-∠______=______°
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解答题-问答题
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【推荐2】已知点
是直线
上一点,
是直角,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/31552c5f-3609-4448-bc3e-8bffed2d5552.png?resizew=440)
(1)如图1.
①若
,求
的度数.
②若
,则
_________(用含
的式子表示).
(2)将图1中的
绕点
顺时针旋转至图2的位置,直接写出
和
的度数之间的关系.
![](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/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/31552c5f-3609-4448-bc3e-8bffed2d5552.png?resizew=440)
(1)如图1.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79684a6e92297749c005e2b23cac9710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f435c3556b48f0eccc958240fc6c7d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b600f913d6d700bbd332b34220b78a21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf7a961a55aa7f225fadb6a25a60c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
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解答题-证明题
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【推荐1】如图1,
,直线
交
于点E,交
于点F,点G在
上,点P在直线
左侧、且在直线
和
之间,连接
.
;
(2)连接
,若
平分
,
,
,求
的度数;
(3)如图2,若
平分
,
的平分线所在的直线与
相交于点H,则
与
之间的数量关系为 .
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb81c026c1fc4b00d615ff754798ceb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7523b11621a81bb20c228775a65a967a.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d31cb19d4833eec524dc1d0bfdf97fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6bf6c6ede58d559c3aea7b20652fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c65c3425b54b3f74623b148d2543615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd82c51c8a9c1dd494cbb1d9c5411719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5baf18ff2424694b66ee0d959f4c1d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460893f14dc72e6a6e3db81d754c4f57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7d9011ed82f5da6d4ae7797ca9b832.png)
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解答题-作图题
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【推荐2】如图,在平行四边形
中,
.
(1)尺规作图:作
的平分线
,交
边于点
(保留作图痕迹,不写作法).
(2)在(1)的条件下,作
交
于点
,请判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9199a3de404cb13ae7710f73db5c8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/da376719-08ad-4db2-9b4e-16c6cca83fd2.png?resizew=147)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)在(1)的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d354155f71a1736c1c9186168695edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e9785a8ffb637c91757fe01d3c23a5.png)
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