如图,在正方形
中,点
在边
上,点A关于直线
的对称点为点F,连接
.设
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/8356ca10-85c7-4237-bc0d-ea9d8fe5235f.png?resizew=331)
(1)试用含
的代数式表示
;
(2)作
,垂足为G,点G在AF的延长线上,连接
,试判断
与
的位置关系,并加以证明;
(3)把
绕点B顺时针旋转90°得到
,点E的对应点为点H,连接
,若
是等腰三角形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf477ccd908dc7826fc9dfc70d0a3b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3160d33de228937b8a691519fced22e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/8356ca10-85c7-4237-bc0d-ea9d8fe5235f.png?resizew=331)
(1)试用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d3ec6447250bb25915ae86873929a.png)
(2)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bab4f7ca681a83a0f3e95feb740a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5cbeac5798a155ac8649f1236fe451d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4acd8c1fd5046f210b6a3393cbe8c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0240ca878cb089ce3e33a6e67d382ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
2023·福建厦门·一模 查看更多[2]
更新时间:2023-03-31 17:45:22
|
相似题推荐
【推荐1】(1)如图1,将一块直角三角板的直角顶点E放在正方形ABCD的对角线AC上(不与点A,C重合,其中的一条直角边经过点D,另一条直角边与BC相交于点F,
①试猜想线段DE、EF之间的数量关系,并说明理由;
②试猜想线段CE、CD、CF之间的数量关系,并说明理由;
(2)如图2,当点F落到BC的延长线上时,请直接写出线段CE、CD、CF之间的数量关系.
①试猜想线段DE、EF之间的数量关系,并说明理由;
②试猜想线段CE、CD、CF之间的数量关系,并说明理由;
(2)如图2,当点F落到BC的延长线上时,请直接写出线段CE、CD、CF之间的数量关系.
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【推荐2】如图,
中,
平分
交
于点
,在射线
上截取
,过点
作
交直线
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/322723bb-9f54-457e-b314-3fa8a642bbbf.png?resizew=160)
(1)试判断四边形
是何种特殊的四边形?并证明你的结论;
(2)当
,
时,四边形
能是正方形吗?如果能,求出此时
的度数;如果不能,试说明理由;
(3)题目改为“
平分
的外角交直线
于点
,在射线
的反向延长线上截取
”,设
.其他条件不变,四边形
能是正方形吗?如果能,求出此时
的度数(用关于
的关系式表示);如果不能,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/934a9508c176f44bf58f88715bd98f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/5/322723bb-9f54-457e-b314-3fa8a642bbbf.png?resizew=160)
(1)试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc688c55cf2d34194d90355a1e9ac48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(3)题目改为“
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/934a9508c176f44bf58f88715bd98f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c922330ff3b792365fddf5972dd3b437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】如图,四边形内接于
,
,
为直径,
为
一动点,连结
交
于点
,交
于点
,连结
.
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
①求证:.
②当时,求半径的长.
(3)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c27450470acdbbe63f7b2ba5ee00d9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51acb3700f39a587ad3047b25498448a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐2】阅读下列材料,并完成相应的学习任务:
图形旋转的应用.图形的旋转是全等变换(平移、轴对称、旋转)中重要的变换之一,利用图形旋转中的对应线段的长度、对应角的大小相等,旋转前后图形的大小和形状没有改变等性质,可以将一般图形转化成特殊图形,从而达到解决问题的目的.
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640313108316160/2643806870175744/STEM/934314ce-a156-4219-9277-c2923b870e68.png)
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640313108316160/2643806870175744/STEM/0e22b62d-9854-43d1-a095-8418810e324d.png)
如图,在
中,
,
平分
,且
,
.过点
作互相垂直的两条直线,即
,
交
于点
,
交
于点
,求四边形
的面积.
分析:将
以点
为旋转中心顺时针旋转,使得旋转后
的对应线段所在直线垂直于
,并且交
于点
,旋转后
的对应线段所在直线交
于点
.则容易证明四边形
为正方形.因为
,
,
,所以
,
所以
.
学习任务:
(1)四边形
的面积等于______;
(2)如图,在
中,
:
①作出
的外接圆
;
②作
的平分线,与
交于点
.
要求:尺规作图,不写作法,但保留作图痕迹
(3)在(2)的基础上,若
,则四边形
的面积等于______.
图形旋转的应用.图形的旋转是全等变换(平移、轴对称、旋转)中重要的变换之一,利用图形旋转中的对应线段的长度、对应角的大小相等,旋转前后图形的大小和形状没有改变等性质,可以将一般图形转化成特殊图形,从而达到解决问题的目的.
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640313108316160/2643806870175744/STEM/934314ce-a156-4219-9277-c2923b870e68.png)
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640313108316160/2643806870175744/STEM/0e22b62d-9854-43d1-a095-8418810e324d.png)
如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3f58c56ea4208b11b56a343ea1de26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
分析:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27bc78604ee7b6e013980b72686f9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c7180c1ddbaaded4f73175667894a0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f345656e1c83913996a54fcb51c3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7856c39f83dbe401bc2cf4926eec5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e255598a3a4f96854e72168d853fedb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ad2d9bdc1e01c98d61ecb78550e287.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa1fcf3d6977672419ef12dd883ce7a.png)
学习任务:
(1)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41c2d7ae6aaf6d91129ed5221a415a7.png)
(2)如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
①作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
②作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
要求:尺规作图,不写作法,但保留作图痕迹
(3)在(2)的基础上,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce28fc2580a49ef3550759cfb1dfff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
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【推荐1】问题提出
已知
是等边三角形,将等边三角形
(A,D,E三点按逆时针排列)绕顶点A旋转,且平移线段
使点A与顶点C重合,得到线段
,连接
.
观察发现
(1)如图1,当点E在线段
上,猜想
的形状 ;
探究迁移
(2)如图2,当点E不在线段
上,(1)中猜想的结论是否依然成立;
拓展应用
(3)若
,
,在
绕着点A旋转的过程中,当
时,求
的长.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b243a3935d5276448f5e5b530e0861.png)
观察发现
(1)如图1,当点E在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
探究迁移
(2)如图2,当点E不在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
拓展应用
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85516a42c9d69ac43e28caef35f14bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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解题方法
【推荐2】(1)如图1,O是等边△ABC内一点,连接OA、OB、OC,且OA=3,BO=4,OC=5,将△BAO绕点B顺时针旋转后得到△BCD,连接OD.
①求旋转角的度数;
②求线段OD的长;
③求∠BDC的度数.
(2)如图2,点O是正方形ABCD内一点,连接OA、OB、OC,将△BAO绕点B顺时针旋转后得到△BCP,连接OP.当OA、OB、OC满足什么条件时,△OCP为直角三角形?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/0498ab9e-3b1f-4678-b28b-6b8609754b0c.png?resizew=186)
①求旋转角的度数;
②求线段OD的长;
③求∠BDC的度数.
(2)如图2,点O是正方形ABCD内一点,连接OA、OB、OC,将△BAO绕点B顺时针旋转后得到△BCP,连接OP.当OA、OB、OC满足什么条件时,△OCP为直角三角形?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/0498ab9e-3b1f-4678-b28b-6b8609754b0c.png?resizew=186)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/2bfa37c2-4928-4e8b-a770-af5ffc7a84d3.png?resizew=178)
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解答题-问答题
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较难
(0.4)
【推荐1】已知
,
,
(
).
(1)观察猜想
如图1,当
时,请直接写出线段
与
的数量关系: ;位置关系: ;
(2)类比探究
如图2,已知
,
分别是
,
,
,
的中点,写出
与
的数量关系和位置关系,并说明理由;
(3)解决问题
如图,已知:
,
,
分别是
,
,
,
的中点,将
绕点
旋转,直接写出四边形
的面积
的范围(用含
的三角函数式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d384390f4e0a1e0abd4cc19382d94db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad9ed5b43e726fad5f9ee38440347e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f64f0db3ac82ba45e8272f63dcc65a9.png)
(1)观察猜想
如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)类比探究
如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0494d0307e7fa9e561781da5332f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
(3)解决问题
如图,已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0494d0307e7fa9e561781da5332f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90a571446744299e6325fd2892743b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487252940644352/2492464332873728/STEM/34b48395-24bd-491d-aac3-3992d465db2b.png)
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解答题-问答题
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较难
(0.4)
名校
【推荐2】已知:在平面直角坐标系xOy中,二次函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6028e9479dc97f5a31513afffb472.png)
的图像与x轴交于点A、B(点A在点B的左侧),与y轴交于点C,△ABC的面积为12.
(1)求这个二次函数的解析式;
(2)点D的坐标为
,点P在二次函数的图像上,∠ADP为锐角,且
,请直接写出点P的横坐标;
(3)点E在x轴的正半轴上,
,点O与点
关于EC所在直线对称,过点O作
的垂线,垂足为点N,ON与EC交于点M.若
,求点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd6028e9479dc97f5a31513afffb472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e307eabb1472141b199733b30ec56fa0.png)
(1)求这个二次函数的解析式;
(2)点D的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47a22764bb5819e53b5615ee974782a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebeed40c3f167b724ab786f3ab923ee4.png)
(3)点E在x轴的正半轴上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1ed0157cd23cffde493919546e3b07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03da1642fb3585c867ff6e18dc9b0039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea10b7adf9be700b32eb530b6203505.png)
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