阅读材料:我们知道:一条直线经过等腰直角三角形的直角顶点,过另外两个顶点分别向该直线作垂线,即可得三垂直模型”如图①:在△ABC中,∠ACB=90°,AC=BC,分别过A、B向经过点C直线作垂线,垂足分别为D、E,我们很容易发现结论:△ADC≌△CEB.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2932059334451200/2960980019757056/STEM/e2b9b9b1-fa84-414c-b164-338f743b25cc.png?resizew=556)
(1)探究问题:如果AC≠BC,其他条件不变,如图②,可得到结论;△ADC∽△CEB.请你说明理由.
(2)学以致用:如图③,在平面直角坐标系中,直线y=
x与直线CD交于点M(2,1),且两直线夹角为α,且tanα=
,请你求出直线CD的解析式.
(3)拓展应用:如图④,在矩形ABCD中,AB=4,BC=5,点E为BC边上一个动点,连接AE,将线段AE绕点E顺时针旋转90°,点A落在点P处,当点P在矩形ABCD外部时,连接PC,PD.若△DPC为直角三角形时,请你探究并直接写出BE的长.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2932059334451200/2960980019757056/STEM/e2b9b9b1-fa84-414c-b164-338f743b25cc.png?resizew=556)
(1)探究问题:如果AC≠BC,其他条件不变,如图②,可得到结论;△ADC∽△CEB.请你说明理由.
(2)学以致用:如图③,在平面直角坐标系中,直线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(3)拓展应用:如图④,在矩形ABCD中,AB=4,BC=5,点E为BC边上一个动点,连接AE,将线段AE绕点E顺时针旋转90°,点A落在点P处,当点P在矩形ABCD外部时,连接PC,PD.若△DPC为直角三角形时,请你探究并直接写出BE的长.
更新时间:2022-04-18 19:52:10
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相似题推荐
解答题-证明题
|
困难
(0.15)
名校
【推荐1】在平面直角坐标系中,已知
,
,
,且
,
交y轴于点E.
(1)如图1,若点C的横坐标为
,求证:
;
(2)如图2,若
平分
,点E的坐标为
,求点C的横坐标;
(3)如图3,若
,以
为边在
的左侧作等边
,当
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/11/23b27eb8-224c-4f5e-9d77-ea2af7bc7c1a.png?resizew=543)
(1)如图1,若点C的横坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5060ad37c403f248c937c1d59af5c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553a93e0b6156befa00b50bdfaef95d9.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e927b84cdf1cdb0cff084c58be670e8c.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae709fac8ed53c80901e7416799aba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
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解答题-作图题
|
困难
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【推荐2】在
中,
,
,
为
边上一点,
为
所在平面内一点,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cb5a076a3862fa4ceba6f003c07615.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/5e9927f2-26db-4483-8b21-8f11ee9dc1e3.png?resizew=621)
(1)若
,点
在
外,连接
交
于点
.
①如图1,
,
为
的中点,画出将
绕点
逆时针旋转
所得到的
,并直接写出
与
之间的数量关系;
②如图2,若
,试探究
与
之间的数量关系;
(2)如图3,若点
在
内,
与
交于点
,
,直接用含
的式子表示
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eba0a1d96f7810e5bfbd6efeee80522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97728603e33f9872d4d9e500cf45d3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3cb5a076a3862fa4ceba6f003c07615.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/5e9927f2-26db-4483-8b21-8f11ee9dc1e3.png?resizew=621)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
①如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.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/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620e762afe722cc547553805ec8e2ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
②如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40400f55908bac95e391aeef79b94d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
(2)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](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/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d1869b04f317f216b982191b256295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79649c83692409ee5fae09331d835f5c.png)
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【推荐3】探究:如图①,△ABC是等边三角形,在边AB、BC的延长线上截取BM=CN,连结MC、AN,延长MC交AN于点P.
(1)求证:△ACN≌△CBM;
(2)∠CPN= °;(给出求解过程)
(3)应用:将图①的△ABC分别改为正方形ABCD和正五边形ABCDE,如图②、③,在边AB、BC的延长线上截取BM=CN,连结MC、DN,延长MC交DN于点P,则图②中∠CPN= °;(直接写出答案)
(4)图③中∠CPN= °;(直接写出答案)
(5)拓展:若将图①的△ABC改为正n边形,其它条件不变,则∠CPN= °(用含n的代数式表示,直接写出答案).
(1)求证:△ACN≌△CBM;
(2)∠CPN= °;(给出求解过程)
(3)应用:将图①的△ABC分别改为正方形ABCD和正五边形ABCDE,如图②、③,在边AB、BC的延长线上截取BM=CN,连结MC、DN,延长MC交DN于点P,则图②中∠CPN= °;(直接写出答案)
(4)图③中∠CPN= °;(直接写出答案)
(5)拓展:若将图①的△ABC改为正n边形,其它条件不变,则∠CPN= °(用含n的代数式表示,直接写出答案).
![](https://img.xkw.com/dksih/QBM/2020/1/17/2379152847110144/2379879146283009/STEM/db0bb2490c8347439d5ef5bb8dbd66e8.png?resizew=443)
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解答题-问答题
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困难
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解题方法
【推荐1】如图,在平面直角坐标系中,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
.
(2)若点
是第一象限内抛物线上一动点,连接
,
,
,设点
的横坐标为
.
①当
为何值时,
的面积最大,并求出最大面积;
②当
为何值时,
是直角三角形.
(3)若点
是抛物线上一点,点
是抛物线对称轴上一点,存在点
使得以
,
,
,
为顶点的四边形是平行四边形,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edaaef402676088180aa24258568d6b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0932ec73157740078a7ac99bf3c128.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解答题-问答题
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困难
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【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.
您最近一年使用:0次
解答题-证明题
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困难
(0.15)
【推荐1】如图1,在等腰中,
,点
为
的中点.点
为
边上一点,连接
,过点
作
于点
,连接
.
(1)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836ea820cf3732508cdd332ceb9395ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed24d7acba0b3a7ebf4d520296424a3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba719217771ea0001b180d1c03cfa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a773187ca2524dbe1fb8add77365ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971cb2684f45635c0e0a923e8a30e958.png)
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解答题-问答题
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困难
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【推荐2】如图, 在平面直角坐标系中, 直线
交两坐标轴于
、
两点,
,且
、
的长分别是一元二次方程
的两根 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9a54c570-c058-4194-99d2-58d82aca7b03.png?resizew=280)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/f17887fa-4e1a-47d0-9561-043b29108285.png?resizew=281)
(1)求
的值;
(2)以线段
的长为边作正方形
(如 图所示) ,对角线
、
交于点
,
的平分线
交
于
,求
的长;
(3)若点
是
轴上任一点, 点
是坐标平面内一点, 若以
、
、
、
为顶点的四边形是菱形, 请直接写出
点的坐标 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66c7a677b9230fe19d301828469ef1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dac77366c746161a381e0589d63e451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/9a54c570-c058-4194-99d2-58d82aca7b03.png?resizew=280)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/f17887fa-4e1a-47d0-9561-043b29108285.png?resizew=281)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f519a757c37be0f7071bb83d5032dc.png)
(2)以线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
解题方法
【推荐3】已知在四边形ABCD中,AD∥BC,AB⊥BC,AD=2,AB=4,BC=6.
(1)如图1,P为AB边上一点,以PD,PC为边作平行四边形PCQD,过点Q作QH⊥BC,交BC的延长线于H.求证:△ADP≌△HCQ;
(2)若P为AB边上任意一点,延长PD到E,使DE=PD,再以PE,PC为边作平行四边形PCQE.请问对角线PQ的长是否存在最小值?如果存在,请求出最小值;如果不存在,请说明理由.
(3)如图2,若P为DC边上任意一点,延长PA到E,使AE=nPA(n为常数),以PE,PB为边作平行四边形PBQE.请探究对角线PQ的长是否也存在最小值?如果存在,请求出最小值;如果不存在,请说明理由.
(1)如图1,P为AB边上一点,以PD,PC为边作平行四边形PCQD,过点Q作QH⊥BC,交BC的延长线于H.求证:△ADP≌△HCQ;
(2)若P为AB边上任意一点,延长PD到E,使DE=PD,再以PE,PC为边作平行四边形PCQE.请问对角线PQ的长是否存在最小值?如果存在,请求出最小值;如果不存在,请说明理由.
(3)如图2,若P为DC边上任意一点,延长PA到E,使AE=nPA(n为常数),以PE,PB为边作平行四边形PBQE.请探究对角线PQ的长是否也存在最小值?如果存在,请求出最小值;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/6/3/2476636182437888/2476908139823104/STEM/9ceabbe98f0e427fb3675b2a1f6aa5a8.png?resizew=503)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】在平面直角坐标系中,△AOB为直角三角形,点O(0,0),点A(0,3),点B在
轴的正半轴上,∠OAB=30°,点P为AB的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957151229550592/2957508620664832/STEM/746f8144-1438-4f8e-a1a2-cd3166e4beb1.png?resizew=437)
(1)如图①,求点P的坐标;
(2)以点O为中心,顺时针旋转△AOP,得到△A1OP1,记旋转角为
(
),点A,P的对应点分别为A1,P1.
①如图②,线段OA1交线段AB于点M,线段OP1交线段AB于点N,当△OMN为等腰三角形时,求点A1的坐标;
②直线OA1交直线AB于点M,直线OP1交线段AB于点N,当△OMN为等腰三角形时,求
的度数(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957151229550592/2957508620664832/STEM/746f8144-1438-4f8e-a1a2-cd3166e4beb1.png?resizew=437)
(1)如图①,求点P的坐标;
(2)以点O为中心,顺时针旋转△AOP,得到△A1OP1,记旋转角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e915c7310f3781887a1afb99dbf949.png)
①如图②,线段OA1交线段AB于点M,线段OP1交线段AB于点N,当△OMN为等腰三角形时,求点A1的坐标;
②直线OA1交直线AB于点M,直线OP1交线段AB于点N,当△OMN为等腰三角形时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】在平面直角坐标系
中,已知点
,A为坐标系中任意一点.现定义如下两种运动:P运动:将点A向右平移
个单位长度,再向上平移
个单位长度,得到点
,再将点
绕点O逆时针旋转
,得到点
;
Q运动:将点A绕点O逆时针旋转
,得到点
,再将点
向右平移
个单位长度,再向上平移
个单位长度,得到点
.
(1)如图,已知点
,
,点A分别经过P运动与Q运动后,得到点
,
.
①若
,请你在下图中画出点
,
的位置;
,求m的值.
(2)已知
,点A,B分别经过P运动与Q运动后,得到点
,
与点
,
,连接
,
.若线段
与
存在公共点,请直接写出此时线段
长度的取值范围(用含有t的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc5dd4d07e2098d8d1b731f2622867f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1fa48602cf15bf3c6483a8d27beae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef2b5ae8b0eb29a44a3db2b2be45477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
Q运动:将点A绕点O逆时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94132e99a6f7294668549b3c3d7a26c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94132e99a6f7294668549b3c3d7a26c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1fa48602cf15bf3c6483a8d27beae0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef2b5ae8b0eb29a44a3db2b2be45477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
(1)如图,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26e951d6d2369e8da79a793a93a66a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8649ce18c628d0e03e72cef541f8284f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013a9d8ab25a70d979be815dd02322fb.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b6269558518a9e0446c9f0f4c6d2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34876d748f30fa4fc2eb6a686b5ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34876d748f30fa4fc2eb6a686b5ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】如图1,四边形
为边长为8的正方形,
中,
且
.如图1所示放置,点
与
重合,
在
边上,
将
沿边
方向平移,平移距离为
个单位长度后,绕点
逆时针旋转,旋转过程中点
始终在四边形
内部(含点
落在正方形
边上).点
为
的中点且点
到
的距离为
.
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4859f8f2503b68b6571c25f07e6dbc7b.png)
(1)当
时,
旋转 度时,点
到
的距离最小,最小值为 .
(2)如图2,当
时,
经过旋转后,点
落在
边上,请求出此时点
到
边的距离(用含x的代数式表示).
(3)如图3,当
时,
经过旋转后,使点
落在
边上,求平移和旋转过程中边
扫过的面积,并直接写出此过程中d的取值范围.
(4)如图4,保持图1中
的形状不变,改变它的大小,使
,并将其沿
边翻折后向下平移,使点
与点
重合,若将
在正方形内部绕点
逆时针方向旋转(顶点
可以落在正方形
的边上),请直接写出的d的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36654c7d11cac20f4b7d0cdbd02ef38c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eba8bf0c4a8e49b3fac25832a0b0005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbc2025077fbc6922067afc766e1b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7626f8ffb7a9ab736066d931a135b146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48059d66f8b5c9864e26bff71edfb844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4920cf22b0a3c23733c6ecd6e5fedef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6aa91bbe46e78c9815c4d8d34e49324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe080584f3b9702893ab6c2d0cee961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4859f8f2503b68b6571c25f07e6dbc7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/45729f24-a62a-4daf-9807-f298f2f00ae5.png?resizew=467)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e37c2eab3fa989d8e986b7356eeb4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae49fc2fdb7600d0d6f239db0de753e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e37c2eab3fa989d8e986b7356eeb4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)如图3,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e37c2eab3fa989d8e986b7356eeb4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(4)如图4,保持图1中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a24f4190852ceada63342b51b7652a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a028fd5b281ef168702a803baca6e8.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e37c2eab3fa989d8e986b7356eeb4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次