如图1,正方形
中,点O是对角线
的中点,点P是线段
上(不与A、O重合)的一个动点,过点P作
且交边CD于点E.
;
(2)若正方形
的边长为6.
①过点E作
于点F,如图2,则在点P运动的过程中,
的长度是否发生变化?若不变,请直接写出这个不变的值;若变化,请说明理由.
②连接
交
于点G,在点P运动的过程中,当
,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/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e770161418673ef53b1029173230e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19087f3b425fa9d33d10878ca987c96.png)
(2)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e332b4a029e1b77cfac45130befe5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e402e4442e30f5f8cee4a49f3772946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
更新时间:2022-10-26 17:51:19
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相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在
ABC中,AC⊥BC,AC=BC,D为AB上一点,AF⊥CD交CD的延长线于点F,BE⊥CD于点E.求证:EF=CF-AF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/11/23/2857366867935232/2858251975598080/STEM/8a143d1a-c00d-4a75-8435-bfb2c97b5005.png)
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解答题-证明题
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适中
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【推荐2】如图,
中,
,
是
上一点,
是
延长线上一点,
且
,若
与
相交于
,求证:
.
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/951344102db1441d9f5ed0cf865ea009.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/59a93626101441a8bcc21aedad40d92f.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/02d9b315820242ac894a0a122993f2d8.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/29fcc1e5197f455096b6a71abf2573ed.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/d294f953efd742b39587d98673ca23ad.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/f0063b60e76d4b21acaca352a8549caf.png)
且
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/fce6c74b2e4641ec902e448b3b791335.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/16dd11f891fd4754a82c9aee08a6e3a7.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/49b185d2bc464f11bf372aa24438353a.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/94f14c5e263142cb93ff7b2c699a5fee.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/2e4df4c09ad446a1b087a76d91b5b1f9.png)
![](https://img.xkw.com/dksih/QBM/2013/3/19/1573619544219648/1573619627589632/STEM/51e828baf3b24f409efec37d6057912c.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在正方形
中,
,点
是正方形外一点,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546736042942464/2548052943273984/STEM/9d5e87a5e9ce4099ba2893e75bf9c532.png?resizew=137)
(1)求
的度数;
(2)求
的长度;
(3)求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070bc896d35495237fd65576e9b6f88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d179eeebf3b3629556548f8ac26be975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69e1d4d3990a80abb69c4b123999ca5.png)
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546736042942464/2548052943273984/STEM/9d5e87a5e9ce4099ba2893e75bf9c532.png?resizew=137)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a55a1a244f81097e05e715b69580faa.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3b28b2c71658e936d7bca6dd2d3bdaa.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐2】定义:我们把对角线互相垂直的四边形叫做神奇四边形.顺次连接四边形各边中点得到的四边形叫做中点四边形.
(1)判断:
①在平行四边形、矩形、菱形中,一定是神奇四边形的是 ;
②命题:如图1,在四边形
中,
则四边形
是神奇四边形.此命题是_____(填“真”或“假”)命题;
③神奇四边形的中点四边形是
(2)如图2,分别以
的直角边
和斜边
为边向外作正方形
和正方形
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb863332a425a37ba7e09a00162dacb0.png)
①求证:四边形
是神奇四边形;
②若
,求
的长;
(3)如图3,四边形
是神奇四边形,若
分别是方程
的两根,求
的值.
(1)判断:
①在平行四边形、矩形、菱形中,一定是神奇四边形的是 ;
②命题:如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1718535539f46b0316df4106e5f0344e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/9ea522f0-793f-4610-80d9-481904d1aa88.png?resizew=155)
③神奇四边形的中点四边形是
(2)如图2,分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6da755b27b851ab0ea7dd9ba38678fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7a0bfc593a8a33b6cade6ba213904c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb863332a425a37ba7e09a00162dacb0.png)
①求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693cd6179b2a92f03153ce12a0e86b95.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22b6b156a1261c1db78b209213ee678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/923dc24c-93c8-4cf9-93d4-7398992e8840.png?resizew=178)
(3)如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933da9352a36cb4cf2fd03e7afc8f0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa971eadaf398203fd72f9d468c3ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/522372a6-3bf0-4669-9b32-013514217133.png?resizew=136)
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