如图,已知在四边形
中,
,
是对角线
上的两点.
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/8/5/2262161194655744/2263431871954944/STEM/8f17737e7a7545d09cd6f427633fd41f.png?resizew=138)
(1)求证:
;
(2)四边形
是平行四边形吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40b3bf6b27f936e0747de92151a1f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27fcafd4e3c295eed2ab9c92c3d4a36b.png)
![](https://img.xkw.com/dksih/QBM/2019/8/5/2262161194655744/2263431871954944/STEM/8f17737e7a7545d09cd6f427633fd41f.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339e859ea91f9aac9beb87d2afcbd8d6.png)
(2)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
更新时间:2019-08-07 07:06:50
|
【知识点】 证明四边形是平行四边形解读
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解答题-作图题
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【推荐2】如图1,图2都是边长为1的全等菱形组成的网格图,网格的交点称为格点,AB是端点落在格点上的线段,请仅用无刻度直尺作出符合下列要求的格点四边形.
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/5c2af1b9-80bd-4cfb-9a32-7a5b668d4494.png?resizew=338)
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