如图,在
中,点
,
在对角线
上,且
.
;
(2)连接
,当对角线满足什么条件时四边形
为菱形.(不需要说明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d99bb3ab66b8884bf23cffe1bddcb33.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
更新时间:2024-05-20 14:34:01
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【推荐1】如图,点C在线段AB上,AD∥EB,AC=BE,AD=BC,DE与BC交于点G,CF平分∠DCE.
(1)求证:△CDE为等腰三角形;
(2)试判断CF、DE的位置关系,并说明理由.
(1)求证:△CDE为等腰三角形;
(2)试判断CF、DE的位置关系,并说明理由.
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【推荐1】如图,已知矩形
,
,
,
是
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、
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、
、
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(1)求证:四边形
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(2)当
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(3)四边形
有可能是矩形吗?若有可能,求出
的长;若不可能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfdfba2e620617d6c2442251d0d7b43e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfdfba2e620617d6c2442251d0d7b43e.png)
(3)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfdfba2e620617d6c2442251d0d7b43e.png)
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【推荐2】如图,
中,点
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【推荐1】如图,梯形ABCD中,AD∥BC,对角线BD的垂直平分线与两底AD、BC分别交于点E、F,判断四边形BEDF的形状并说明理由.
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【推荐2】如图,在平行四边形
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