问题背景
在
中,
,点D为边
上一动点,点E为边
上一动点,沿直线
把
翻折,得到
,
问题解决
(1)如图1,当
与B重合时,求线段
的长;
(2)如图2,当
与边
相交于点F,且
时,连接
.
①求五边形
面积的最大值;
②连接
,则
的周长的最小值为___________(直接写出答案).
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be7bb04798dea65725a48893104b24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/29/5615ddfb-c6c7-4451-b037-6359daca6092.png?resizew=342)
问题解决
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968b886a9f161fdcab1e08cba8ece5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e07ec05313a6eb0f27994f432493fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
①求五边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a621d0ba529307e9df8d2a467af1083.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037b1a3ec2e37bbcb05d0a467efb511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db121e30b06b467f5d270a1c7d91860e.png)
更新时间:2023-10-27 10:29:28
|
相似题推荐
解答题-问答题
|
困难
(0.15)
【推荐1】如图,直线
分别与
轴、
轴交于点
,抛物线
经过点
,与
轴的另一个交点为
,抛物线的对称轴
交
于点
.
(1)求抛物线的函数关系式及对称轴;
(2)若
为
轴上一动点,
为
的中点,过点
作
的中垂线,交抛物线于点
,其中
在
的左边.
①如图1,若
时,求
的长.
②当以点
为顶点的三角形是直角三角形时,请直接写出点
的坐标.
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462110814175232/2462518643572736/STEM/6b8ea5eca9ff44789fd4c4ba544a4ad2.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e80c699eabb025fb94e1830822ca9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求抛物线的函数关系式及对称轴;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005a4c101c7687cb533e38f1587b93e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
②当以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857abea4530449f94f26885904fcafa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462110814175232/2462518643572736/STEM/6b8ea5eca9ff44789fd4c4ba544a4ad2.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462110814175232/2462518643572736/STEM/6b8ea5eca9ff44789fd4c4ba544a4ad2.png?resizew=200)
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解答题-问答题
|
困难
(0.15)
【推荐2】抛物线
与x轴交于A、B两点,与y轴交于点C,且点A的坐标为
,点C的坐标为
,对称轴为直线
.点D是抛物线上一个动点,设点D的横坐标为m,连接AC,BC,DC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/d22b99fe-af38-464b-b3a6-0b337c46f8bd.png?resizew=314)
(1)求抛物线的函数表达式;
(2)若
,求m值.
(3)点F坐标为(0,2),连接AF,点P在直线AF上,点Q是平面上任意一点,当以A、C、P、Q四点为顶点的四边形为菱形时,直接写出Q坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cc6de24c9f456f41c15f609fe2c2c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5a63e00afba3220756e65d76e3b25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3946d125737c62ef0bfd43e50a6fbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/d22b99fe-af38-464b-b3a6-0b337c46f8bd.png?resizew=314)
(1)求抛物线的函数表达式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d1535c1f2cdfafc431bd658dc51744.png)
(3)点F坐标为(0,2),连接AF,点P在直线AF上,点Q是平面上任意一点,当以A、C、P、Q四点为顶点的四边形为菱形时,直接写出Q坐标.
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【推荐3】如图,抛物线y=﹣
x2
x+4交x轴于A,B两点(点B在A的右边),与y轴交于点C,连接AC,BC.点P是第一象限内抛物线上的一个动点,点P的横坐标为m,过点P作PM⊥x轴,垂足为点M,PM交BC于点Q.
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978325102854144/2979775762915328/STEM/2be0aab8-9d11-4318-8d0d-70740ea67b1d.png?resizew=225)
(1)求A、B两点坐标;
(2)过点P作PN上BC,垂足为点N,请用含m的代数式表示线段PN的长,并求出当m为何值时PN有最大值,最大值是多少?
(3)试探究点P在运动过程中,是否存在这样的点Q,使得以A,C,Q为顶点的三角形是等腰三角形.若存在,请求出此时点Q的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/312cfa86e279c6e07d16959f8b18ad75.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978325102854144/2979775762915328/STEM/2be0aab8-9d11-4318-8d0d-70740ea67b1d.png?resizew=225)
(1)求A、B两点坐标;
(2)过点P作PN上BC,垂足为点N,请用含m的代数式表示线段PN的长,并求出当m为何值时PN有最大值,最大值是多少?
(3)试探究点P在运动过程中,是否存在这样的点Q,使得以A,C,Q为顶点的三角形是等腰三角形.若存在,请求出此时点Q的坐标,若不存在,请说明理由.
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困难
(0.15)
名校
【推荐1】【回顾思考】
翻折,常常能为解决问题提供思路和方法.
【初步尝试】
(1)如图1,在三角形纸片
中,
,
,将
折叠,使点
与点
重合,折痕为
,求
的值;
(2)如图2,在三角形纸片
中,
,
,
,将
沿过顶点
的直线折叠,使点
落在边
上的点
处,折痕为
.
①求线段
的长;
②若点
是边
的中点,点
为线段
上的一个动点,将
沿
折叠得到
,点
的对应点为点
,
与
交于点
,求
的取值范围.
翻折,常常能为解决问题提供思路和方法.
【初步尝试】
(1)如图1,在三角形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30f9b7a6123f13fa0793ead76dc651a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464c24c1b5c93ac4bc6752fa1f8e4f9e.png)
(2)如图2,在三角形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d6929baa76a9dd07f5bdcfc518987f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
①求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cf8e6bfbe3b365f8e9278cc469d2b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784b26de6134b6d3f5a81e2882a7d7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c2a13ae01a4259107f8ba176fd56c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42198b8e646ccfbbec323fd364c4d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85617d27e16fbf5549964b0d7caa1d4e.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】如图,在锐角
中,
,点
,
分别是
,
上的动点,连接
,
.
,且
,
平分
,求
的度数.
(2)如图2,若
,在平面内将线段
绕点
顺时针方向旋转60度得到线段
,连接
,过点
做
,垂足为点
,在点
运动过程中,猜想线段
,
,
之间存在的数量关系,并证明你的猜想.
(3)如图3,若点
为
下方一点,连接
,
,
为等边三角形,将
沿直线
翻折得到
.
是线段
上一点,将
沿直线
翻折得到
,连接
,当线段
取得最小值,且
时,请求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2da1d50433aecf541991fd0f01773cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.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/d8a71e8a816d9ef65d4bffd81fd53216.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa106172cc7b3db22ebbcbc1fe84c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(3)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f381da95a07d7f8322f5b1e1d0cb55ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f381da95a07d7f8322f5b1e1d0cb55ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e4adb57bb8c217187e1f78eba3829b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d345376fe3af68bd6ceda2fa1d9dc8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a8588dc60a543ad70d6bc0d263dbd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdc82c9ba581fa7f462ed812d195cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47f16fd36e5e70402ee695c6fc5727c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f21d12419f487bbae57ab1b04e7670.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐3】【问题情境】:
数学活动课上,同学们开展了以折叠为主题的探究活动,如图1,已知矩形纸片
,其中宽
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/3d0164a0-d152-4a80-ab82-752e63bfff54.png?resizew=463)
(1)【动手实践】:
如图1,威威同学将矩形纸片
折叠,点
落在
边上的点
处,折痕为
,连接
,然后将纸片展平,得到四边形
,则折痕
的长度为______.
(2)【探究发现】:
如图2,胜胜同学将图1中的四边形
剪下,取
边中点
,将
沿
折叠得到
,延长
交
于点
.点
为
边的中点,点
是边
上一动点,将
沿
折叠,当点
的对应点
落在线段
上时,求此时
的值;
(3)【反思提升】:
明明同学改变图2中
点的位置,即点
为
边上一动点,点
仍是边
上一动点,按照(2)中方式折叠
,使点
落在线段
上,明明同学不断改变点
的位置,发现在某一位置
与(2)中的
相等,请直接写出此时
的长度.
数学活动课上,同学们开展了以折叠为主题的探究活动,如图1,已知矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2c6c3cc1875ad112d8c4eac793337c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/15/3d0164a0-d152-4a80-ab82-752e63bfff54.png?resizew=463)
(1)【动手实践】:
如图1,威威同学将矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
(2)【探究发现】:
如图2,胜胜同学将图1中的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438bf2134641f9950932bd667188d63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12daf5fea89631b84f896939c503d88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f6710dda2de3a067589017798a716c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2abe80bcbf8e8b50b743c2a76ff6bb8.png)
(3)【反思提升】:
明明同学改变图2中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f6710dda2de3a067589017798a716c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2833f45298c3c18433b157ff6cc63267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b4eea854f71c03b451cd3005119f38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】将一副三角尺(在
中,
,
;在
中,
,
)如图1摆放,点
为
的中点,
交
于点
,
经过点
.
![](https://img.xkw.com/dksih/QBM/2019/7/8/2242455903059968/2243016498806784/STEM/405c7a50c2ee40c09b830445918b749a.png?resizew=408)
(1)求
的度数.
(2)如图2,将
绕点
顺时针方向旋转角
,此时的等腰直角三角尺记为
,
交
于点
,
交
于点
.设
,
,
.
①求出
与
的函数解析式,并写出
的取值范围;
②在
绕点
旋转的过程中,
能否成为等腰三角形,若能,求
的值;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3789f30eaf7a21b76c7ce09ade3d5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91f064bb73019053992fe781a53356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6414089941feb5d8a4a6a49566b9ca.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2019/7/8/2242455903059968/2243016498806784/STEM/405c7a50c2ee40c09b830445918b749a.png?resizew=408)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3634979dfcebf857b20874dd320d80b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/027a52de17a73839a082e04eddae9a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad939fb794ca44ff63dc8f25add62138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056155da945914f9f389ff1cd1704b0c.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/9e62064f8d8569d3a2c0c2fad2126740.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/ea98a1fefa6385dd05aded1ebce24edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7620e6e3d20aa99737afb18b5b5ba161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83cb6327dcbc8a998e6586bcfa7a3b9.png)
①求出
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3634979dfcebf857b20874dd320d80b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07db7d83c3f6bcd69a2850df43e48b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解答题-作图题
|
困难
(0.15)
【推荐2】在平面直角坐标系中,以坐标原点O为顶点的正方形
,其中点
.对于线段
,若线段
与正方形
有且仅有两个交点P,Q,且满足
,则称线段
是正方形
的“倍长线”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/bee041df-dc10-4e3b-95d0-f55773c1dd05.png?resizew=420)
(1)如图,点
,
,
,
.在线段
,
,
,
中,为正方形
的“倍长线”的是 ;
(2)记正方形
的“倍长线”
的中点为R.
①若线段
的长度为4,且P,Q分别位于
,
上,求点R到原点的距离;
②若线段
的长度为6,在图2中直接画出所有满足条件的点R所组成的图形;
(3)若正方形
的“倍长线”
,其中
.
①则t的取值范围是 ;
②线段
的长度l的取值范围是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bd9e1ebf9609e41bb0309a61650dcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe361a5cc59e64d26f5b8013f94d4568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/bee041df-dc10-4e3b-95d0-f55773c1dd05.png?resizew=420)
(1)如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f59961a788e8dc69a12f4a4eedffd83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1853a59371d13be0a70f973130913906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff6578fe6e9997a7a48c81ea8217adb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276b2b280cb79158fae431e8ca24c664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(2)记正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
①若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
②若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)若正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b7ba50c5269d8b2d1b44d4f1845c0b.png)
①则t的取值范围是 ;
②线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-作图题
|
困难
(0.15)
【推荐1】如图,点O为线段MN的中点,直线PQ与MN相交于点O,利用此图∶
![](https://img.xkw.com/dksih/QBM/2019/10/9/2308093918240768/2309696367788032/STEM/96efa91a-f44f-4f09-8a72-57734f947f1e.png?resizew=364)
(1)作一个平行四边形AMBN,使A、B两点都在直线PQ上(只保留作图痕迹,不写作法)
(2)根据上述经验探究∶在□ ABCD中,AE⊥CD交CD于E点,F为BC的中点,连接EF、AF,试猜想EF与AF的数里关系,并给予证明.
(3)若∠D=60°,AD=4,CD=3,求EF的长.
![](https://img.xkw.com/dksih/QBM/2019/10/9/2308093918240768/2309696367788032/STEM/96efa91a-f44f-4f09-8a72-57734f947f1e.png?resizew=364)
(1)作一个平行四边形AMBN,使A、B两点都在直线PQ上(只保留作图痕迹,不写作法)
(2)根据上述经验探究∶在□ ABCD中,AE⊥CD交CD于E点,F为BC的中点,连接EF、AF,试猜想EF与AF的数里关系,并给予证明.
(3)若∠D=60°,AD=4,CD=3,求EF的长.
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】如图1,在
中,
,D,E两点分别在
上,且
.将
绕点A顺时针旋转,得到
,延长
,
交于点F连接
,如图2所示,
;
(2)求证:
;
(3)若
,
,点P为
的中点当
旋转一周的过程中,求
的最大值.
![](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/17487118ab7a90fc8c91bf0870f3289e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a48a700725aa5032190e863c632d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f0ae0d8e74c9ca1708ce83c36c94df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d025bf758ad33fb58596134fc8a59d0a.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95087161482cf6fc8b7ad244be5fe9b8.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/021ff5673121d6c5804a66af60e7e9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次