如图,
中,
,点
是
边上的中点,点
是
边上的一个动点,延长
到
,使
,作
,其中
点在
上.
(1)如图①,若
,则
_______.
(2)如图②,若
,求
的值;
(3)如图③,若
,延长
到点
,使得
,连接
,在点
运动的过程中,探究:当
的值为多少时,线段
与
的长度和取得最小值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3906e1a4a697c6be917133b2749101ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54ba5ce6970e847f6ea1089a124f60e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(1)如图①,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37cc97999243c11718a026b55e3ba8c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/37fa6331-9fc8-4b56-9a7c-819966ac4171.png?resizew=190)
(2)如图②,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498d4ac8f567c0d9ce831fced78a55c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57643b5d1ed4bd6269460a23c569f07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/12274197-6b16-4b97-87a7-83507ad53839.png?resizew=218)
(3)如图③,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b811acfd144f31a52b38e492bfe2733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1bd115fa8e48e214fd2b90b0df6a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2619c2a509d4546cc6de66d404b6f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/e24333c0-5260-407b-a598-7f1ad03d09fd.png?resizew=197)
更新时间:2020-05-05 11:00:13
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,以
为直径作
,交
于点
.过点
作
的切线
,交
于点
.
![](https://img.xkw.com/dksih/QBM/2019/5/20/2207794527862784/2207847215824896/STEM/2cb8c470587049a4902b599e6d21baca.png?resizew=174)
(1)求证:
.
(2)填空:①当
_________
时,
为等边三角形;
②连接
,当
_________
时,四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2019/5/20/2207794527862784/2207847215824896/STEM/2cb8c470587049a4902b599e6d21baca.png?resizew=174)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd260fb9d772c122dcb1df52cbe38ab.png)
(2)填空:①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4397f6e86c69e6b597e7e8635afbfb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4b17ce6e90cd3810a3696262e94c1e.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4397f6e86c69e6b597e7e8635afbfb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81a6235ef96041dbf59ac50e6e5f86f.png)
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【推荐2】如图,在△ABC中,点E在线段AB上,点D在射线CB上,且ED=EC,将△BCE绕点C顺时针旋转60°至△ACF(点B、E的对应点分别为点A、F),连接EF.
(1)求证:AE=DB;
(2)在不添加任何辅助线的情况下,请直接写出图中四对线段,使每对线段长度之和等于AB的长.
(1)求证:AE=DB;
(2)在不添加任何辅助线的情况下,请直接写出图中四对线段,使每对线段长度之和等于AB的长.
![](https://img.xkw.com/dksih/QBM/2017/2/22/1633723047870464/1633723048230912/STEM/203334b9f96d44f8b46d6df57ee7e38f.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,AB为⊙O的直径,弦CD⊥AB于E,点F在DC的延长线上,AF交⊙O于G.
![](https://img.xkw.com/dksih/QBM/2022/8/31/3056466589024256/3069035780898816/STEM/35cb05d17d8248cdabe47d7aac0afe3b.png?resizew=255)
(1)求证:∠FGC=∠ACD;
(2)若AE=CD=8,试求⊙O的半径.
![](https://img.xkw.com/dksih/QBM/2022/8/31/3056466589024256/3069035780898816/STEM/35cb05d17d8248cdabe47d7aac0afe3b.png?resizew=255)
(1)求证:∠FGC=∠ACD;
(2)若AE=CD=8,试求⊙O的半径.
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解答题-证明题
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适中
(0.65)
【推荐2】如图,四边形
内接于
,延长
到点
,连接
交于点
,且
.
平分
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3e081637bcea5368cc72370bae283b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9f2e558a520a6f64706159d8e1b4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】如图1,已知∠MBN=90°,四根长度相等的木棒AB,BC,CD,DA首尾相接组成四边形ABCD,点F是AB的中点,连接BD,CF交于点E,BE的垂直平分线GH交AB于点G,交BD于点H,连接GE.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966644218929152/2969222404718592/STEM/057380dca2374e1f9777d156bfcab526.png?resizew=329)
(1)如图1,若BC,BA分别在BM,BN上,求证:GE⊥AB;
(2)如图2,将木棒BA固定在射线BN上,当木棒BC绕着点B由BM开始顺时针旋转时,求证:AD=3GE;
(3)在(2)的旋转过程中,设∠MBC=α,且α满足0°<α<90°.若△GEF是直角三角形,请直接写出α的值.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966644218929152/2969222404718592/STEM/057380dca2374e1f9777d156bfcab526.png?resizew=329)
(1)如图1,若BC,BA分别在BM,BN上,求证:GE⊥AB;
(2)如图2,将木棒BA固定在射线BN上,当木棒BC绕着点B由BM开始顺时针旋转时,求证:AD=3GE;
(3)在(2)的旋转过程中,设∠MBC=α,且α满足0°<α<90°.若△GEF是直角三角形,请直接写出α的值.
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解答题-问答题
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【推荐2】如图1,在平面直角坐标系中,经过点
的直线
与
轴交于点
.经过原点
的抛物线
交直线
于点
,
,抛物线的顶点为
,对称轴与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/8ed622fd-edd8-4a92-b00c-9cad375b4401.png?resizew=282)
(1)求抛物线
的表达式;
(2)
是线段
上一点,过点
作
,交抛物线于点
,若
点的横坐标为
,线段
的长为
,求
与
之间的函数关系式;
(3)如图2,连接
,当点
是对称轴左侧抛物线上一动点时,过点
作
于
,连接
,若
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d429efe96d68065e7d433c996682791d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/8ed622fd-edd8-4a92-b00c-9cad375b4401.png?resizew=282)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/1a646fb1459ac2adb931234b6e4f57a2.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76f3c89328e84ad058917b3290290f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图,在四边形ABCD中,
,
,垂足为O,过点D作BD的垂线交BC的延长线于点E.
(2)若AC=4,AD=2,
,求BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)若AC=4,AD=2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f6e6f1cffdd4861a7fd9d1acdfbca8b.png)
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真题
名校
【推荐2】如图,矩形OABC的顶点A,C分别落在x轴,y轴的正半轴上,顶点B(2,2
),反比例函数
(x
0)的图象与BC,AB分别交于D,E,BD=
.
(1)求反比例函数关系式和点E的坐标;
(2)写出DE与AC的位置关系并说明理由;
(3)点F在直线AC上,点G是坐标系内点,当四边形BCFG为菱形时,求出点G的坐标并判断点G是否在反比例函数图象上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求反比例函数关系式和点E的坐标;
(2)写出DE与AC的位置关系并说明理由;
(3)点F在直线AC上,点G是坐标系内点,当四边形BCFG为菱形时,求出点G的坐标并判断点G是否在反比例函数图象上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/2ff67d8e-fc23-427b-9d23-10a6a9414b9c.png?resizew=304)
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