如图,在
中,连接
,取
中点O,过点O作直线
,分别交
于点E,F.
;
(2)连接
,试说明四边形
是平行四边形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fe060a37a93ea736e9c3d444809cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaedb59b442983718f9c992ba94b8822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
22-23八年级下·北京海淀·期中 查看更多[5]
北京市海淀区人大附中航天城学校2022~2023学年八年级下学期期中数学试题安徽省滁州市天长市天长市实验中学2023-2024学年九年级上学期开学数学试题(已下线)专题05 平行四边形【四大题型】-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(北京专用)(已下线)第六章 平行四边形能力提升测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(北师大版)(已下线)专题6.3 平行四边形的判定(知识梳理与考点分类讲解)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
更新时间:2024-06-02 09:37:20
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解答题-证明题
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【推荐1】如图,在平行四边形
中,点E是
边的中点,连接
并延长交
的延长线于点F.
;
(2)连接
,试判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d824d850121cf020705046754c1240a5.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e60d720997062d0a062c606fa9a87fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61510c34c5795d7261569b4d09098271.png)
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【推荐2】如图,E,F是平行四边形
的对角线
上两点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/413dae32-915a-4fe1-9d90-b8556a929cb4.png?resizew=148)
(1)求证:
;
(2)连接
,
,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/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/413dae32-915a-4fe1-9d90-b8556a929cb4.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4e52f73744d10842ce9a50fb454ca6.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
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名校
【推荐1】如图,在
中,点E、F分别在
、
上,且
.求证:四边形
是平行四边形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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【推荐2】如图,BD是△ABC的角平分线,点E、F分别在BC、AB上,且DE∥AB,EF∥AC;
(1)求证:BE=AF;
(2)如图,若∠A=∠C=60°,请写出4个面积等于△ABC面积一半的几何图形.
(1)求证:BE=AF;
(2)如图,若∠A=∠C=60°,请写出4个面积等于△ABC面积一半的几何图形.
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