题型:解答题-证明题
难度:0.65
引用次数:264
题号:11110107
如图①,在正方形
中,
是
上一点,点
在
的延长线上,且
交
于
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966c6f9d1cc0b2361c8ace00bc25188b.png)
问题提出:(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8eaf3bcb432de827ac9cd4df4b6afa2.png)
拓展与探索:(2)请求出
的度数;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/be93d5ed-67fa-4a7b-b345-b88dcf4bedc7.png?resizew=131)
问题解决:(3)如图②,把正方形
改为菱形
,其他条件不变,当
时,连接
,试探究线段
与线段
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda24f73d4a6173e2b873682d17c4991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966c6f9d1cc0b2361c8ace00bc25188b.png)
问题提出:(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8eaf3bcb432de827ac9cd4df4b6afa2.png)
拓展与探索:(2)请求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffab06abe01c9b48aa4692c73d8b7c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/be93d5ed-67fa-4a7b-b345-b88dcf4bedc7.png?resizew=131)
问题解决:(3)如图②,把正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07c321ebb740613ff53c1d6e496ee85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/23/c5b2aab9-2aa2-4569-a00c-117e91a1ff78.png?resizew=138)
更新时间:2020-09-15 21:23:52
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【推荐2】如图,点A,F,C,D在同一直线上,
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(1)如图1,求证:△ABC为等边三角形;
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、
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2763fad81fad0ea7cb868c439cb51ac9.png)
(2)填空:①若
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【推荐2】已知:如图,在四边形
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【推荐1】 阅读下列材料:如图(1)在四边形ABCD中,若AB=AD,BC=CD,则把这样的四边形称之为“筝形”
解答问题:如图(2)将正方形ABCD绕着点B逆时针旋转一定角度后,得到正方形GBEF,边AD与EF相交于点H.请你判断四边形ABEH是否是“筝形”,说明你的理由.
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【推荐2】如图,已知正方形
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