(1)如图①,将矩形纸片
沿对角线
折叠,使点B落在点
处,
与
交于点E,求证:
是等腰三角形;
(2)点O是矩形纸片
对角线的交点,将该纸片沿过点O的线段
折叠,使点A的对应点为
,点B与点D重合,连接
,求证:四边形
是菱形;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/13/03822853-9c47-4159-94de-bd9d9769d984.png?resizew=338)
(2)点O是矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2283590c7c41c5e9a294fa73bc549d63.png)
2023·甘肃张掖·二模 查看更多[2]
更新时间:2023-05-31 14:15:34
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相似题推荐
解答题-证明题
|
适中
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【推荐1】等腰
,
,点A、C分别在x轴、y轴的正半轴上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/20ddadd9-38e3-4758-af8a-a54e41b6f560.png?resizew=426)
(1)如图1,求证:
;
(2)如图2,若
,求B点的坐标;
(3)如图3,点
,Q、A两点均在x轴上,且
.分别以
为腰在第一、第二象限作等腰
、等腰
,连接
交y轴于P点,线段
的长度是否会发生改变,若不变,求出
的值,若有变化,求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149d217efaf5090696904003ec06393a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/20ddadd9-38e3-4758-af8a-a54e41b6f560.png?resizew=426)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3c96f7c468a5bd9529cdfcd684e736.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f1f79a8779b187ce7c26457d37199a.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c43f704b5d150cb4e29e9796a07d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4503431b67e6e74d77bdcbfa23e1ea00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fdf0691bed34683c0e965e71f39aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b5d6a9c27e8b16b922188970ccc394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31722d9fcf160e643945ec261b7eea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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名校
【推荐2】如图,在
中
,点
,
分别为
,
的中点,连接
,作
与
相切于点
,在
边上取一点
,使
,连接
.
(1)判断直线
与
的位置关系,并说明理由;
(2)当
,
时,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977d47cc13333428132e37a3529bd8fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/e90719c3-277b-4764-b96e-549b1f2ed5da.jpg?resizew=169)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad18d3f2e42fc960e17ff4bde2b2f7cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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适中
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【推荐1】如图,∠ABD=∠ACD=90°,∠1=∠2.
求证:AD平分∠BDC.
![](https://img.xkw.com/dksih/QBM/2018/1/9/1856715490459648/1862544243007488/STEM/312535f9f142414eb93097fd7104e4bf.png?resizew=169)
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【推荐2】如图,
为
的直径,
为弧
中点,
于点
,
交
于点
,交
于点
,
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989914904739840/2991236252631040/STEM/a8262f97-d10b-4bb3-b60c-3e63af58ee31.png?resizew=161)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989914904739840/2991236252631040/STEM/a8262f97-d10b-4bb3-b60c-3e63af58ee31.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d72501af35b1b3003bf0ed308424dd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98cf32c824e192723130a6012e91f5cd.png)
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解答题-证明题
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【推荐1】综合与实践
实践操作:如图1,已知矩形纸片
.
第一步:如图2,将纸片沿
折叠,使点B的对应点
正好落在
上,然后展平纸片,得到折痕
;
第二步:如图3,在图2的基础上,沿
折叠纸片,点C的对应点落在
处,
与
交于点F.
(1)如图2,判断四边形
的形状,并证明;
(2)如图3,证明
;
(3)若
,则
的周长为___(直接写出答案即可).
实践操作:如图1,已知矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
第一步:如图2,将纸片沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
第二步:如图3,在图2的基础上,沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900b844294e8c07ea9a858adb845121c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
(1)如图2,判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ea12a2e06244c3bac26861779284e3.png)
(2)如图3,证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960481381a9312950efc6d87a021b540.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41cd7b4dd31fc8c85f9ffeb654c82b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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【推荐2】如图,已知矩形
的对角线
的垂直平分线与边
分别交于点
.
(1)求证:四边形
是菱形(请结合图①写出证明过程).
(2)如图②,矩形纸片
沿着
折叠,使得点
与点
重合,若
,试求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/b0c00b38-80de-4dd2-8b06-3e54f91f455c.png?resizew=354)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766e5eb6796dafc5ffe212afdfc43c0.png)
(2)如图②,矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a88c6225ee65e6849aa0ddc62081101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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【推荐1】平行四边形ABCD中,AD=2AB,AE=AB=BF
求证:CEDF.
求证:CEDF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/d3bce955-9a0b-46e7-9490-34ec1f75ac8f.png?resizew=213)
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【推荐2】如图,在四边形ABCD中,E、F分别是AD、BC的中点,G、H分别是BD、AC的中点.
⑴判断四边形EGFH的形状;
⑵当四边形ABCD的边AB、CD满足什么条件时,四边形EGFH是菱形,并说明理由.
⑴判断四边形EGFH的形状;
⑵当四边形ABCD的边AB、CD满足什么条件时,四边形EGFH是菱形,并说明理由.
![](https://img.xkw.com/dksih/QBM/2019/3/29/2170545977819136/2174055603060736/STEM/5b9ec2235f4a49149aacdbc9eb146124.png?resizew=192)
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