如图,在边长为2的正方形ABCD中,P是BC边上一动点(点P不与B、C重合),将△ABP沿直线AP翻折,点B落在点E处;在CD上有一点M,使得将△CMP沿直线MP翻折后,点C落在直线PE上的点F处,直线PE交CD于点N,连接MA、NA,则以下结论:①△CMP∽△BPA;②四边形AMCB的面积最大值为2.5;③△ADN≌△AEN;④线段AM的最小值为2.5;⑤当P为BC中点时,AE为线段NP的中垂线.正确的有_____ (只填序号)
![](https://img.xkw.com/dksih/QBM/2018/5/19/1948551310180352/1949927291420672/STEM/72ac82a21a3e48c1ba7b99e6d38714ba.png?resizew=130)
2018·湖南岳阳·一模 查看更多[3]
【全国市级联考】湖南省岳阳市2018届九年级中考数学一模试题【全国市级联考】广东省广州市2018年中考数学模拟试卷(五)(已下线)第13讲 相似三角形判定定理的证明-【帮课堂】2022-2023学年九年级数学上册同步精品讲义(北师大版)
更新时间:2018-05-21 08:40:08
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【推荐1】如图,点P是双曲线
上的一点,过点P作y轴的平行线交直线
:
于点Q,连接
.当点P在曲线上运动,且点P在Q的上方时,则四边形
面积的最大值是______ .
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【推荐2】如图,边长为4的正方形ABCD中,P是BC边上一动点(不含B、C点).将
沿直线AP翻折,点B落在点E处;在CD上有一点M,使得将
沿直线MP翻折后,点C落在直线PE上的点F处,直线PE交CD于点N,连接MA,NA.则以下结论中正确的有_____ (写出所有正确结论的序号).
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948845748969472/2949486509531136/STEM/9a3f2e6de69e4f3a9712666249135971.png?resizew=263)
①
;
②当P为BC中点时,AE为线段NP的中垂线;
③四边形AMCB的面积最大值为10;
④线段AM的最小值为
;
⑤当
≌
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ae7d7f5a3bba2a5fe4f84a3b96bde7.png)
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c5003e791ed735554d3be400d0bfaf.png)
②当P为BC中点时,AE为线段NP的中垂线;
③四边形AMCB的面积最大值为10;
④线段AM的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eda61683bb1d4d62441f0625097b477.png)
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【推荐1】如图,以
的两边
,
为边向形外作正方形
,
,则称这两个正方形为外展双叶正方形.有以下5个结论:①
面积与
面积相等.②过点
作边
的垂线交
于点
,则
.③
为边
的中点,
延长线与
交于点
,则
且
.④连接
、
相交于点
,则
且
.⑤连结
,
为
的中点,则
且
.其中正确的结论是_________ (填序号).
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分别在正方形
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【推荐1】如图,已知菱形
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【推荐2】如图,已知在Rt△ABC中,
,在△ABC内作第一个内接正方形DEFG;然后取GF的中点P,连接PD,PE,在△PDE内作第二个内接正方形HIKJ;再取线段KJ的中点Q,在△QHI内作第三个内接正方形…依次进行下去,则第2022个内接正方形的边长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886d3f9d72d99005a9694c9ad8a6f706.png)
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