已知:如图,AB∥CD,点O是BC的中点,BE∥CF,BE、CF分别交AD于点E、F.
![](https://img.xkw.com/dksih/QBM/2016/3/15/1573986068316160/1573986074894336/STEM/ec56d911ca634816a1724142da0550f7.png)
(1)图中有几组全等三角形,请把它们直接表示出来;
(2)求证:BE=CF.
![](https://img.xkw.com/dksih/QBM/2016/3/15/1573986068316160/1573986074894336/STEM/ec56d911ca634816a1724142da0550f7.png)
(1)图中有几组全等三角形,请把它们直接表示出来;
(2)求证:BE=CF.
更新时间:2016-12-06 05:05:46
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【推荐1】
,直线EF交AB于点E,交CD于点F,点G在CD上,点P在直线EF右侧、且在直线AB和CD之间,连接PE、PG.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/c52ef976-a330-4192-b02c-bc8b64332876.png?resizew=191)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/716e081d-5af7-41d7-88dd-bc0209e9721c.png?resizew=189)
(1)如图1,求证:
:
(2)如图1,连接EG,若EG平分
,
,
,
,求
的度数;
(3)如图2,若EF平分
,
的平分线GN所在的直线与EF相交于点H,则
与
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/c52ef976-a330-4192-b02c-bc8b64332876.png?resizew=191)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/716e081d-5af7-41d7-88dd-bc0209e9721c.png?resizew=189)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3a3138ba75dab83ae5b8e0c7e8c439.png)
(2)如图1,连接EG,若EG平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d31cb19d4833eec524dc1d0bfdf97fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1096a1a9222e9361ccf61d717da1a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c657df4554f1c4e10e1136c3ed4fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714717fc062950e7758cca011adcfb30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3acb6b5359a901c5b5a71f32f7f6ca32.png)
(3)如图2,若EF平分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ff8ae98a4922abf8c86c8028d9a067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f80fcc149502f668d1d4aa8c0997b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460893f14dc72e6a6e3db81d754c4f57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7d9011ed82f5da6d4ae7797ca9b832.png)
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【推荐2】如图,在
中,D是
的中点,过点D的直线
交
于点F,交
的平行线
于点G,
交
于点E,连接
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(1)求证:
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(2)请你判断
与
的大小关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857ddadd26b361243d81ffb744c7d4f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c253d12009daeacbbd1b5e6c8c341723.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/ace87461-a029-4c74-b370-cc051a8edc53.jpg?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a078a64cb037055362600cc94ff780e9.png)
(2)请你判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66b632c49dbebc4b2182592d68ee937.png)
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【推荐1】如图,点
在同一条直线上,
、
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/f02db564-0ef1-4f6a-a661-ec219f94c37d.png?resizew=174)
(1)求证:
;
(2)若
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b9d1367c12ca12ad67a049d24643d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424269ceef173843aae76e39ecdf6111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499c1138294ecfbb0fd556802e08f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/f02db564-0ef1-4f6a-a661-ec219f94c37d.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c244edbf77fbb8e9c017515e370c5c8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305905e59c28b2ce0eabc087cd1a9d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
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【推荐2】如图,一块边长为5的正方形木板ABCD斜靠在墙边,OC⊥OB,点A,B,C,D,O在同一平面内,过点A作AE⊥OB于点E.
![](https://img.xkw.com/dksih/QBM/2022/2/11/2913960206303232/2936885736611840/STEM/ff51e2df-0d98-4aee-a8e8-6c82e4d130c3.png?resizew=153)
(1)求证:△ABE≌△BCO;
(2)若OC=3,求EO的长.
![](https://img.xkw.com/dksih/QBM/2022/2/11/2913960206303232/2936885736611840/STEM/ff51e2df-0d98-4aee-a8e8-6c82e4d130c3.png?resizew=153)
(1)求证:△ABE≌△BCO;
(2)若OC=3,求EO的长.
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