在平面直角坐标系xOy中,矩形ABCO的顶点A、C分别在y轴、x轴正半轴上,点P在AB上,PA=1,AO=2.经过原点的抛物线
的对称轴是直线x=2.
![](https://img.xkw.com/dksih/QBM/2013/8/15/1573677134233600/1573677140418560/STEM/53c3e9d3-7ae2-4dc3-9e4c-433160aaccd3.png?resizew=465)
(1)求出该抛物线的解析式.
(2)如图1,将一块两直角边足够长的三角板的直角顶点放在P点处,两直角边恰好分别经过点O和C.现在利用图2进行如下探究:
①将三角板从图1中的位置开始,绕点P顺时针旋转,两直角边分别交OA、OC于点E、F,当点E和点A重合时停止旋转.请你观察、猜想,在这个过程中,
的值是否发生变化?若发生变化,说明理由;若不发生变化,求出
的值.
②设(1)中的抛物线与x轴的另一个交点为D,顶点为M,在①的旋转过程中,是否存在点F,使△DMF为等腰三角形?若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585145bd8029f640e02179d31bff0360.png)
![](https://img.xkw.com/dksih/QBM/2013/8/15/1573677134233600/1573677140418560/STEM/53c3e9d3-7ae2-4dc3-9e4c-433160aaccd3.png?resizew=465)
(1)求出该抛物线的解析式.
(2)如图1,将一块两直角边足够长的三角板的直角顶点放在P点处,两直角边恰好分别经过点O和C.现在利用图2进行如下探究:
①将三角板从图1中的位置开始,绕点P顺时针旋转,两直角边分别交OA、OC于点E、F,当点E和点A重合时停止旋转.请你观察、猜想,在这个过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4821eec9eb06107b9297db207544d62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4821eec9eb06107b9297db207544d62a.png)
②设(1)中的抛物线与x轴的另一个交点为D,顶点为M,在①的旋转过程中,是否存在点F,使△DMF为等腰三角形?若不存在,请说明理由.
更新时间:2016-12-05 18:37:14
|
相似题推荐
解答题-问答题
|
困难
(0.15)
【推荐1】如图,抛物线
与
轴相交于
,与
轴相交于点
,过点C作
轴,交抛物线于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/f8dd4a99-43ab-49cc-a22e-1876ac4b7b9a.png?resizew=162)
(1)求梯形ACDB的面积;
(2)若梯形ACDB的对角线
交于点
,求点
的坐标,并求经过
三点的抛物线的解析式; .
(3)点
是射线
上一点,且
与
相似,求符合条件的
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71531d795e0d02761faf8d953b31febb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/796ea3826380a16db89e806a41d10430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/f8dd4a99-43ab-49cc-a22e-1876ac4b7b9a.png?resizew=162)
(1)求梯形ACDB的面积;
(2)若梯形ACDB的对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290b884d1dd1c199ce9314d3f99714b5.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图1,抛物线
与x轴交于点
,
,与y轴交于点C.点D是
的中点,点P是抛物线上的一个动点.
(2)当
时,求四边形
的面积.
(3)当
时,求点P的坐标.
(4)如图2,过点P作直线
的垂线,垂足为M.以
为对角线作正方形
,当点Q落在抛物线
的对称轴上时,请直接写出 点P的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2160a5319834d61c4c6186321a0354b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae4b8de8f5573d19d0abacbdb8cef37.png)
(4)如图2,过点P作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
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解答题-证明题
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【推荐1】综合与实践
问题情境:
在矩形
中,E是
边上的一点,过点E作对角线
的垂线,垂足为点F,点G是
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/5e5fbad5-852f-4add-a816-f2a04ca5529b.png?resizew=469)
小试牛刀:
(1)如图1,若
,直接写出线段
与
的数量关系以及
的度数.
变式探究:
(2)如图2,在(1)的条件下,将图1中的
绕点B逆时针旋转,使点F落在
边的延长线上,其余条件不变,请探究(1)中的结论是否仍然成立,若成立,请证明;若不成立,请说明理由.
拓展延伸:
(3)将
绕点B逆时针旋转(旋转角小于360°),请探究下列问题:
①若将“矩形
”变为“正方形
”,其余条件不变,请在图3中画出旋转到某一位置的图形,并直接写出线段
与
的数量关系以及
的度数;
②连接
,若要保证
绕点B逆时针旋转过程中,
始终为等边三角形,写出矩形
应满足的条件.
问题情境:
在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49486f228c69a021ae92464fe0ce37f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/5e5fbad5-852f-4add-a816-f2a04ca5529b.png?resizew=469)
小试牛刀:
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f170fe03fca4c750505265bd49f004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f824371a146ba1db2bf20b6f0dacc139.png)
变式探究:
(2)如图2,在(1)的条件下,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
拓展延伸:
(3)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
①若将“矩形
![](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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f824371a146ba1db2bf20b6f0dacc139.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e977cb08909ddb77a8c1236bca620ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-作图题
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(0.15)
名校
【推荐2】在等边
中,
,
,垂足为
,点
为
边上一点,点
为直线
上一点,连接
.
![](https://img.xkw.com/dksih/QBM/2021/11/18/2854049704198144/2855952367878144/STEM/fa85caa7-22ef-41bb-ba7d-7c0580ac7d73.png?resizew=192)
![](https://img.xkw.com/dksih/QBM/2021/11/18/2854049704198144/2855952367878144/STEM/e539bf9e-89e3-4b4e-bb3a-f3d9108a4f1b.png?resizew=165)
(1)作图:请根据以下要求在图1中画出相应的部分图形,并求线段
的长;当点
与点
重合时,将线段
绕点
逆时针旋转
得到线段
,连接
.并且延长
,发现过点
点,最后连接
.
(2)如图2,当点
为
中点时,点
为
中点,点
在边
上,且
,点
从
中点
沿射线
运动,将线段
绕点
顺时针旋转
得到线段
,连接
、
,其中MP交BD于K点,且在运动过程中∠QKP始终等于∠FEP,则当
最小时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2021/11/18/2854049704198144/2855952367878144/STEM/fa85caa7-22ef-41bb-ba7d-7c0580ac7d73.png?resizew=192)
![](https://img.xkw.com/dksih/QBM/2021/11/18/2854049704198144/2855952367878144/STEM/e539bf9e-89e3-4b4e-bb3a-f3d9108a4f1b.png?resizew=165)
(1)作图:请根据以下要求在图1中画出相应的部分图形,并求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d809626d493659af6f297326fa3f0e.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c118858379800688c993a8b61270b356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf51e885a7cf8ca33c53363163b908d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18397ea7440a25bdf84595372be40fe0.png)
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真题
【推荐3】如图1,在平面直角坐标系xOy中,点M为抛物线
的顶点,过点(0,4)作x轴的平行线,交抛物线于点P、Q(点P在Q的左侧),PQ=4.
(1)求抛物线的函数关系式,并写出点P的坐标;
(2)小丽发现:将抛物线
绕着点P旋转180°,所得新抛物线的顶点恰为坐标原点O,你认为正确吗?请说明理由;
(3)如图2,已知点A(1,0),以PA为边作矩形PABC(点P、A、B、C按顺时针的方向排列),
.
①写出C点的坐标:C( , )(坐标用含有t的代数式表示);
②若点C在题(2)中旋转后的新抛物线上,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b46ca2a2e8bb8f18b76f72742f1c1cb.png)
(1)求抛物线的函数关系式,并写出点P的坐标;
(2)小丽发现:将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b46ca2a2e8bb8f18b76f72742f1c1cb.png)
(3)如图2,已知点A(1,0),以PA为边作矩形PABC(点P、A、B、C按顺时针的方向排列),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98785c1afda95986e32d9d6de2320628.png)
①写出C点的坐标:C( , )(坐标用含有t的代数式表示);
②若点C在题(2)中旋转后的新抛物线上,求t的值.
![](https://img.xkw.com/dksih/QBM/2014/8/18/1573745588461568/1573745594695680/STEM/76e98564-f230-4a01-9e74-57fe9bce563f.png?resizew=356)
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解答题-证明题
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困难
(0.15)
【推荐1】在
中,点D,E分别在边
,
上,且
,
.
时,求
的度数.
(2)如图2,点F在
上,
,当
平分
时,求证:四边形
是菱形.
(3)如图3,连接
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cc1c481e243ca311a6369c8313a18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d00572a90232e08932317af2a53767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)如图2,点F在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b3f839ce88bf970aceb44ab939bd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dfa01bffe6f5d08931c75970c16b69.png)
(3)如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702c324e0c76150540c3d32df802077.png)
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解答题-问答题
|
困难
(0.15)
名校
【推荐2】如图,在平面直角坐标系中,抛物线
与x轴交于B(-3,0)、C(1,0)两点,与y轴交于点A(0,2),抛物线的顶点为D.连接AB,点E是第二象限内的抛物线上的一动点,过点E作EP⊥BC于点P,交线段AB于点F.
(1)求此抛物线的解析式;
(2)过点E作EG⊥AB于点G,Q为线段AC的中点,当△EGF周长最大时,在
轴上找一点R,使得|RE-RQ|值最大,请求出R点的坐标及|RE-RQ|的最大值;
![](https://img.xkw.com/dksih/QBM/2018/1/8/1856007696031744/1862155505205248/STEM/edd87d0014db46f08203fc02d00486d1.png?resizew=270)
(3)在(2)的条件下,将△PED绕E点旋转得△ED′P′,当△AP′P是以AP为直角边的直角三角形时,求点P′的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(1)求此抛物线的解析式;
(2)过点E作EG⊥AB于点G,Q为线段AC的中点,当△EGF周长最大时,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2018/1/8/1856007696031744/1862155505205248/STEM/edd87d0014db46f08203fc02d00486d1.png?resizew=270)
(3)在(2)的条件下,将△PED绕E点旋转得△ED′P′,当△AP′P是以AP为直角边的直角三角形时,求点P′的坐标.
![](https://img.xkw.com/dksih/QBM/2018/1/8/1856007696031744/1862155505205248/STEM/0a09e20e11d04434ba545c2e1fa7b855.png?resizew=270)
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解答题-问答题
|
困难
(0.15)
名校
【推荐1】如图,四边形
中,
,
,
,
,
,点
、
同时从
点出发,沿射线
向右匀速移动.已知
点移动速度是
点移动速度的
倍,以
为一边在
的上方作等边
设
点移动距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/9faf46ae-8ee1-4549-88c9-b7eb63793fe1.png?resizew=285)
(1)点
在四边形
的边上时,
______;点
与点
重合时,
______;
(2)求出使
成为等腰三角形的
的值;
(3)求
与四边形
重叠部分的面积
与
之间的函数关系式,并直接写出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fd12581cde7779e735bd3f4ad6d1c1.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/7f9e8449aad35c5d840a3395ea86df6d.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d29de50677fdee57c21e5470d2b3c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56cd54985686d64271f9e1b31a93705a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/9faf46ae-8ee1-4549-88c9-b7eb63793fe1.png?resizew=285)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
(2)求出使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a37ba261860ddad9d11b2e8348a8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,在
中,
,
,
,动点
从点
出发,沿
以每秒2个单位长度的速度向终点
匀速运动,设点
的运动时间为
秒
.过点
作
的垂线交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/1862c759-2e4e-48ea-aa69-64cf0801e3ff.png?resizew=165)
(1)
___________.
(2)求
的长.(用含有
的代数式表示)
(3)若将点
绕点
逆时针旋转
于点
.
①求
的长(用含
的代数式表示)
②在点
运动的同时,作点
关于点
的对称点
,连结
,当
为等腰三角形时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07eabb3ff92cc5e071c48df759e64ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/1862c759-2e4e-48ea-aa69-64cf0801e3ff.png?resizew=165)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若将点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bd29802a63ea91037ee8b4d64da44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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