如图,在平行四边形ABCD中,AD⊥AC,AD=AC,点E为AB上一动点,DE与AC相交于点G,CH⊥DE,垂足为H,CH的延长线与AB相交于点F,点P在边AB上
(1)若DG=
,AG=1,求AB的长
(2)求证DG=CF+FG
(3)若AP=1,AD=
,请直接写出PH的最小值
(1)若DG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
(2)求证DG=CF+FG
(3)若AP=1,AD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
20-21八年级下·重庆·阶段练习 查看更多[5]
重庆市第五十七中学校2020-2021学年八年级下学期阶段测试数学试题重庆市教科院巴蜀实验学校2021-2022学年八年级下学期期中数学试题重庆市巴南区2019-2020学年八年级下学期期末数学试题(已下线)八年级数学期末模拟卷(湖北专用)-学易金卷:2023-2024学年初中下学期期末模拟考试重庆市綦江区联盟校2023-2024学年八年级下学期期中考试数学试题
更新时间:2021-08-11 13:44:04
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【推荐1】如图,已知直线
分别交x轴、y轴于A、C两点,直线BC过点C交x轴于点B,且OB=2OC=3OA,点D为AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/2edba945-1dc5-4b73-aa1a-49b5f51fade8.png?resizew=248)
(1)求k的值以及直线BC的解析式;
(2)过点D作DE⊥y轴交BC于点E,连接OE,求四边形AOEC的面积;
(3)已知点P是线段BC上的一个动点,点Q是x轴上的一个动点,当以点D、P、Q为顶点的三角形为等腰直角三角形时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023ab3a7eb0f59993c7608576e47c0f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/16/2edba945-1dc5-4b73-aa1a-49b5f51fade8.png?resizew=248)
(1)求k的值以及直线BC的解析式;
(2)过点D作DE⊥y轴交BC于点E,连接OE,求四边形AOEC的面积;
(3)已知点P是线段BC上的一个动点,点Q是x轴上的一个动点,当以点D、P、Q为顶点的三角形为等腰直角三角形时,求点P的坐标.
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【推荐2】(1)如图1,△ABC中,∠C=90°,AB的垂直平分线交AC于点D,连接BD.若AC=2,BC=1,则△BCD的周长为 .
(2)O为正方形ABCD的中心,E为CD边上一点,F为AD边上一点,且△EDF的周长等于AD的长.
①图2中求作△EDF(要求:尺规作图,不写作法,保留作图痕迹);
②图3中补全图形,直接写出∠EOF的度数.
(2)O为正方形ABCD的中心,E为CD边上一点,F为AD边上一点,且△EDF的周长等于AD的长.
①图2中求作△EDF(要求:尺规作图,不写作法,保留作图痕迹);
②图3中补全图形,直接写出∠EOF的度数.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/5c56fc82-8504-4768-839c-613e9b541db8.png?resizew=442)
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【推荐1】如图1,
,
,
,点
从点
出发以每秒1个单位长度的速度向点
运动,点
同时从点
出发以每秒2个单位长度的速度向点A运动,当一点到达终点时,另一点也停止运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/c8e3049a-a169-45c5-80c6-79adf21263cc.png?resizew=385)
(1)求
的长.
(2)当以点
、
、
为顶点的三角形与
相似时,求
的值.
(3)如图2,将本题改为点
从点
出发以每秒3个单位长度的速度在
上向点
运动,点
同时从点
出发向点
运动,其速度是每秒2个单位长度,其它条件不变,求当
为何值时,
为等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69550d878381f6e8fb436e88638f070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e071479287e774f7f0990b1a649658f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/c8e3049a-a169-45c5-80c6-79adf21263cc.png?resizew=385)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图2,将本题改为点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e8babee63bfc889ae5a34632284bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea026175f6fd49221750160c56db9b5.png)
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【推荐2】如图1,在平面直角坐标系中,四边形
是矩形,点
,
的坐标分别为
,
.点
是线段
上的一个动点(点
与点
,
不重合),直线
过点
并与折线
交于点
,设
的面积为
,回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/84fbef86-34cf-4c49-a9f4-6639d645702a.png?resizew=355)
探究:(1)当直线
过点
时,
的值是________;
延伸:(2)如图2,当点
在线段
上时,矩形
关于直线
对称的图形为矩形
,线段
与线段
交于点
,线段
与线段
交于点
,得到菱形
.
直接写出:菱形
面积的最大值是:________,此时
________;
拓展:(3)在点
运动的过程中,①直接写出
与
的函数关系式;
②当
________时,(2)中菱形
的面积与
相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb13bbc5335efc427f9c619a51dae3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252e377f8bf75bc6fd986758873054a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b5e1433d7c2ad6a5b2de8a557a43d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ceee289a7affa4bf09083df915dfb28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/84fbef86-34cf-4c49-a9f4-6639d645702a.png?resizew=355)
探究:(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
延伸:(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352529b508315e10a9a078898c2ae8f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7bdf7e08e931ba7df81d0e88c43596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48e33eaa40d01f976230d4b73ae91dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b584cac35c71a70d09b03119d3859a94.png)
直接写出:菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b584cac35c71a70d09b03119d3859a94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
拓展:(3)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b584cac35c71a70d09b03119d3859a94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐3】在学习《锐角三角函数》一章时,小明同学对一个角的倍角的三角函数值是否具有关系产生了浓厚的兴趣,进行了一些研究.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932746374062080/2947320066154496/STEM/48a68033ea5d4bbbadc6b6c5fb28eddd.png?resizew=450)
(1)初步尝试:我们知道:tan60°= ,tan30°= ,发现结论:tanA 2tan
∠A(填“=”或“≠”);
(2)实践探究:如图1,在Rt△ABC中,∠C=90°,AC=2,BC=1,求tan
∠A;
小明想构造包含
∠A的直角三角形:延长CA至D,使得DA=AB,所以得到∠D=
∠A,即转化为求∠D的正切值.
请按小明的思路进行余下的求解:
(3)拓展延伸:如图2,在Rt△ABC中,∠C=90°,tanA=
.求tan2A的值.
![](https://img.xkw.com/dksih/QBM/2022/3/9/2932746374062080/2947320066154496/STEM/48a68033ea5d4bbbadc6b6c5fb28eddd.png?resizew=450)
(1)初步尝试:我们知道:tan60°= ,tan30°= ,发现结论:tanA 2tan
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)实践探究:如图1,在Rt△ABC中,∠C=90°,AC=2,BC=1,求tan
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
小明想构造包含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
请按小明的思路进行余下的求解:
(3)拓展延伸:如图2,在Rt△ABC中,∠C=90°,tanA=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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【推荐1】数学活动课上,老师让同学们根据下面情境提出问题并解答.
问题情境:在
中,点
是边
上一点,将
沿直线
折叠,点
的对应点为
.
数学思考:
(1)“兴趣小组”提出的问题是:如图1,若点
与点
重合,过点
作
,与
交于点
,连接
,则四边形
是______ (填菱形,矩形,正方形)
拓展探究:
(2)“智慧小组”提出的问题是:如图2,当点
为
的中点时,延长
交
于点
,连接
.试判断
与
的位置关系,并说明理由;
问题解决:
(3)“创新小组”在前两个小组的启发下,提出的问题是:如图
,当点
恰好落在
边上时,
,
,
,求
的长.
问题情境:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9017cfed5393f9b21602107ed164c733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
数学思考:
(1)“兴趣小组”提出的问题是:如图1,若点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d354155f71a1736c1c9186168695edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8057131f4bae6260aaeda1eb3c77fb7c.png)
拓展探究:
(2)“智慧小组”提出的问题是:如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d09859dfab140e55e3cc3e7d67d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d09859dfab140e55e3cc3e7d67d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
问题解决:
(3)“创新小组”在前两个小组的启发下,提出的问题是:如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e5a8fdbfbdf25f6937b7a2d6a4cd95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19e69c3e231ac182ef14e0dda2fe45f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f745aecfd95f4f4f64cc1c7c98a65ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/ebd999c0-d5c5-479b-9c21-42f56f7bdba0.png?resizew=368)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知平行四边形
,E为
边上的中点,F为
边上的一点,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/427e9ab8-0a7d-4fd0-9a78-677974cb1623.png?resizew=497)
(1)如图1,连接
并延长交
的延长线于点G,求证:
;
(2)如图2,若
,
,求
;
(3)如图3,若
,P为
的中点,Q为
的中点,
,
,
①判断
与
的位置关系,并说明理由;
②求
.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/427e9ab8-0a7d-4fd0-9a78-677974cb1623.png?resizew=497)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4763d25d89038fd620543cebeb9b630b.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e195e21a4520c4ce130785171af56d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048982728a2204a2f78c3f186af4c07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cad196e55dbd13c45e11a51d700383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8adbc96bd4697ace4d9a318db350c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f403d7982e80e4b0a306e64e7e72fa0.png)
①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在正方形
中,点
在边
上(点
与点
不重合),过点
作
,
与边
相交于点
,与边
的延长线相交于点
.
、
的长,从中你能发现
的数量之间具有怎样的关系?并证明你所得到的结论;
(2)连接
,如果正方形的边长为2,设
,
的面积为
,求
与
之间的函数解析式,并写出函数的定义域;
(3)如果正方形的边长为2,
的长为
,求点
到直线
的距离.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1051ef731f266dbf72ccb19dc222bf2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662ecc67db7277595a0b53d8e218f799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.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/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc457104b52b1200418b204f57101e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654d41965ba34635c85e50f2a5b9d5db.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029ad83f1a3262048cba0e650b63e929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如果正方形的边长为2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,O为原点,矩形
的顶点,
,
;等边
的顶点
,点E是
的中点.
(2)将等边
沿水平方向向右平移,得到等边
,点E,P,Q的对应点分别为
,设
,等边
与矩形
重叠部分面积记为S.
①如图②,当边
与
相交于点M,边
与
相交于点N,点
在点
的左侧且矩形
与
重叠部分为五边形时,试用含有t的式子表示S,并直接写出t的取值范围;
②当
时,求S的取值范围(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b06536def707b74b7ea5c125a520aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35abbe5dccf78f470aa95cf46428719f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecec75226ca000eb662cc297bd1e6f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)将等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40f10bdc431c06d85fd595e0f9f0964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b119ba7c0bacd4dea4aae189aefac30a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e4b3dfef7e441f580ca62f1013cded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40f10bdc431c06d85fd595e0f9f0964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①如图②,当边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363466a50da60714b982c0cc5cdabc30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0bf3b8f4fe49282177efd30d3d9824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9946665cf48e9bc11bab0bf23a5af58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40f10bdc431c06d85fd595e0f9f0964.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0643d60b3094ea6185dbd00430a802.png)
您最近一年使用:0次