阅读下列材料:问题:如图1,在菱形
和菱形
中,
,点A,B,E在同一条直线上,P是线段
的中点,连接
,
,探究
与
的位置关系.
(1)请你写出上面问题中线段
与
的位置关系,并说明理由;
(2)将图1中的菱形
绕点B顺时针旋转,使菱形
的对角线
恰好与菱形
的边
在同一条直线上,原问题中的其他条件不变(如图2).你在(1)中得到的结论是否发生变化?写出你的猜想并加以证明,
(3)将菱形
和菱形
均改成正方形,如图3,P为
的中点,此时
与
的位置关系和数量关系分别是什么?直接写出答案.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5f3f3ab861429d91093284373a3e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(1)请你写出上面问题中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)将图1中的菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)将菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/13/2fb4c31e-748d-4419-a955-60296a422db5.png?resizew=612)
更新时间:2018-05-07 23:37:40
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】在△ABC中,BA=BC,∠ABC=α(0°<α<180°),点P为直线BC上一动点(不与点B,C重合),连接AP,将线段PA绕点P顺时针旋转α度得到线段PQ,连接CQ.
(1)当α=90°,且点P在线段BC上时,过P作PF∥AC交直线AB于点F,如图1,图中与△APF全等的是哪个三角形,∠ACQ的度数.
(2)当点P在BC延长线上,AB:AC=m:n时,如图2,试求线段BP与CQ的比值;
(3)当点P在直线BC上,α=60°,∠APB=30°,CP=4时,请直接写出线段CQ的长.
(1)当α=90°,且点P在线段BC上时,过P作PF∥AC交直线AB于点F,如图1,图中与△APF全等的是哪个三角形,∠ACQ的度数.
(2)当点P在BC延长线上,AB:AC=m:n时,如图2,试求线段BP与CQ的比值;
(3)当点P在直线BC上,α=60°,∠APB=30°,CP=4时,请直接写出线段CQ的长.
![](https://img.xkw.com/dksih/QBM/2019/1/9/2114970277806080/2115894280609792/STEM/4cb44b8e2c6745cead724e1a3e5b779c.png?resizew=480)
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【推荐2】如图,在边长为
的正方形ABCD中,G是AD延长线上的一点,且D为AG中点,动点M从A点出发,以每秒1个单位的速度沿看A→C→G的路线向G点匀速运动(M不与A,G重合),设运动时间t秒,连接BM并延长交AG于N点.
![](https://img.xkw.com/dksih/QBM/2019/9/23/2297034188365824/2297523301146624/STEM/16f3be6ca2ea414e90682e4984a25f76.png?resizew=205)
(1)当t为何值时,△ABM为等腰三角形?
(2)当点N在AD边上时,若DN⊥HN,NH交∠CDG的平分线于H,求证:BN=HN;
(3)过点M分别作AB,AD的垂线,垂足分别为E,F,矩形AEMF与△ACG重叠部分的面积为S,请直接写出S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2019/9/23/2297034188365824/2297523301146624/STEM/16f3be6ca2ea414e90682e4984a25f76.png?resizew=205)
(1)当t为何值时,△ABM为等腰三角形?
(2)当点N在AD边上时,若DN⊥HN,NH交∠CDG的平分线于H,求证:BN=HN;
(3)过点M分别作AB,AD的垂线,垂足分别为E,F,矩形AEMF与△ACG重叠部分的面积为S,请直接写出S的最大值.
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【推荐3】如图,点A(a,0),B(0,b),且a、b满足(a﹣2)2+|4b﹣8|=0.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/111ee91e-f0b6-44d2-9ca3-52650896492f.png?resizew=398)
(1)如图1,求a,b的值;
(2)如图2,点C在线段AB上(不与A、B重合)移动,AB⊥BD,且∠COD=45°,猜想线段AC、BD、CD之间的数量关系并证明你的结论;
(3)如图3,若P为x轴正半轴上异于原点O和点A的一个动点,连接PB,将线段PB绕点P顺时针旋转90°至PE,直线AE交y轴于点Q,当P点在x轴上移动时,线段BE和线段BQ中哪一条线段长为定值,并求出该定值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/111ee91e-f0b6-44d2-9ca3-52650896492f.png?resizew=398)
(1)如图1,求a,b的值;
(2)如图2,点C在线段AB上(不与A、B重合)移动,AB⊥BD,且∠COD=45°,猜想线段AC、BD、CD之间的数量关系并证明你的结论;
(3)如图3,若P为x轴正半轴上异于原点O和点A的一个动点,连接PB,将线段PB绕点P顺时针旋转90°至PE,直线AE交y轴于点Q,当P点在x轴上移动时,线段BE和线段BQ中哪一条线段长为定值,并求出该定值.
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解答题-问答题
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【推荐1】如图,在
中,
,
,
,点
从点
出发沿
方向以
秒的速度向点
匀速运动,同时点
从点
出发沿
方向以
秒的速度向点
匀速运动,当其中一个点到达终点时,另一个点也随之停止运动.设点
,
运动的时间是
秒(
).过点
作
于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/2019/12/17/2357116082380800/2357236437065728/STEM/e7d6cdcf69cb44faa93e277b2ca90e71.png?resizew=226)
(1)四边形
能够成为菱形吗?如果能,求出相应的
值;如果不能,请说明理由;
(2)当
为何值时,
为直角三角形?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb28b48d10fb8581026bb7deb9146346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd251c1ee4a9eae0445804d2ad44c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72323b0c1b4fe6c38059289d55c69e2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6880ddb3928816ed54da71cbea155fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b84c9d873289f99d8eb733d12899280.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/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2019/12/17/2357116082380800/2357236437065728/STEM/e7d6cdcf69cb44faa93e277b2ca90e71.png?resizew=226)
(1)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbac9880dc9f88968865bccd2183d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3634979dfcebf857b20874dd320d80b3.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】(1)如图1,在矩形
中,对角线
与
相交于点
,过点
作直线
,且交
于点
,交
于点
,连接
,且
平分
.
①求证:四边形
是菱形;
②直接写出
的度数;
![](https://img.xkw.com/dksih/QBM/2019/4/4/2175014128107520/2175377694949376/STEM/b18b4f83a6bf40bc80341b0d435c37d4.png?resizew=189)
(2)把(1)中菱形
进行分离研究,如图2,
分别在
边上,且
,连接
为
的中点,连接
,并延长
交
于点
,连接
.试探究线段
与
之间满足的关系,并说明理由;
![](https://img.xkw.com/dksih/QBM/2019/4/4/2175014128107520/2175377694949376/STEM/cdeab3e98b5d44dd8b0b5a3cc3a632b2.png?resizew=174)
(3)把(1)中矩形
进行特殊化探究,如图3,矩形
满足
时,点
是对角线
上一点,连接
,作
,垂足为点
,交
于点
,连接
,交
于点
.请直接写出线段
三者之间满足的数量关系.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c672f693a7e75a7bae4936dcb1920430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f95fd176854673d22eb930f45103d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
①求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb65bee4fb8c2cbdd36e318cd652f928.png)
![](https://img.xkw.com/dksih/QBM/2019/4/4/2175014128107520/2175377694949376/STEM/b18b4f83a6bf40bc80341b0d435c37d4.png?resizew=189)
(2)把(1)中菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b8fc74eea80b1ccf11d16ad7b3178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55c4168f6caac8cbd1090992b3658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374b695e202c97916304d5cae7ec0879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def2e9a2af4e23a0bface823ee50f2ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4acb03ac3fe740c7309305b19a998f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892e37a8f937098ad3a2b8e60d59b14d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://img.xkw.com/dksih/QBM/2019/4/4/2175014128107520/2175377694949376/STEM/cdeab3e98b5d44dd8b0b5a3cc3a632b2.png?resizew=174)
(3)把(1)中矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/b5f0805cc7a96c866df10b667ac4851e.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10a50f8e9877c52487b7909a280dfb6.png)
![](https://img.xkw.com/dksih/QBM/2019/4/4/2175014128107520/2175377694949376/STEM/1d775cc6f0db4a0e983e6ee6201e98ce.png?resizew=133)
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【推荐3】定义:在平面直角坐标系中,对于任意两点
,
,如果点
满足
,
,那么称点M是点A、B的“双减点”.
例如:
,
、当点
满足
,
,则称点
是点A、B的“双减点”.
(1)写出点
,
的“双减点”C的坐标;
(2)点
,点
,点
是点E、F的“双减点”.求y与x之间的函数关系式;
(3)在(2)的条件下,y与x之间的函数图象与y轴、x轴分别交于点A、C两点,B点坐标为
,若点E在平面直角坐标系内,在直线AC上是否存在点F,使以A、B、E、F为顶点的四边形为菱形?若存在,请求出F点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fb1a589404b101361fab4a264af920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4adb1a0c5fbcaa7cb61b2febdb7db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921d268c12d82592b37741cae29beff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72bd2d9be473b9afcd54daefe59c7f51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bbb928d585972dc263b7b76251d7e1.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49176d7d98d7fe5d73b6baae82eb1496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb53f956b6be1e8e146cade08864463d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c6aca0ce527899db4e1eddb9eb0fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ece1447697b2fa8650c6b959caaa16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df66c9e0752628d3e15c8ea0e4360fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441a16588920a5685d9c536486981670.png)
(1)写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d011530516d015febb5a8269593c82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d6f1a0fd23ca84d143d820311bf138.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302df86c7543f8548459f2fbea0dbbf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369ade1144400a4e1288632f13e3990c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/921d268c12d82592b37741cae29beff2.png)
(3)在(2)的条件下,y与x之间的函数图象与y轴、x轴分别交于点A、C两点,B点坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/375e545f21d0a11be2cb3ec32f88278e.png)
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【推荐1】在平面直角坐标系中,抛物线
经过点
.点
在
轴上,其纵坐标为
,作点
关于点
的对称点为点
,以点
为对称中心,以
长为边长作正方形
,且
轴.
(1)求该抛物线对应的函数关系式.
(2)当点
在点
的上方,且正方形
的顶点在抛物线上时,求
的长.
(3)当正方形
的某一条边与抛物线有两个交点时,设这两个交点的横坐标分别为
、
.若
,求
的值.
(4)当抛物线在正方形
内部的图像对应的函数值
先随
值的增大面减小、后随
值的增大而增大时,若该抛物线与正方形
交点的线坐标之差为2.直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f09b500a60ed3a5d28eca9546b5de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a23e87d16c32b5aa4357f481b5808a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
(1)求该抛物线对应的函数关系式.
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd888afdcfdb3e91a157d50f65e915e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d03e2db4161af58dfd667d94b5636b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)当抛物线在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】给定一个函数,如果函数的图象上存在一个点,它的横、纵坐标相等,那么这个点叫做给定函数的不动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/1dd64989-daea-4c91-9184-bb9b9a8eec3c.png?resizew=309)
(1)求一次函数
的不动点坐标;
(2)如图1,二次函数
的两个不动点分别为P、Q(点P在点Q的左侧),将点P绕点Q逆时针旋转
得到点R,求点R的坐标;
(3)如图2,二次函数
的两个不动点的坐标分别为
,
.
①求a,b的值;
②若C为一次函数
的不动点,以线段
为边向下作正方形
,当D,E两点中只有一个点在二次函数
的图象上时,直接写出m的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/4/1dd64989-daea-4c91-9184-bb9b9a8eec3c.png?resizew=309)
(1)求一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6342e0a5a8942cfb1cf535ceb2c50d.png)
(2)如图1,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3545e7e26133b92eda21e52cd8ab4b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
(3)如图2,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc9aa334c8a364cbc597127d60b2b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f68f688a0af020ed2aa105a1bcdb52.png)
①求a,b的值;
②若C为一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe22d0cee40ad652466d25d9e7c9264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
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【推荐1】【问题背景】
“综合与实践”课上,王老师带领同学们剪拼图形,用发展的眼光看问题,感受图形的变换美!
【特例感知】
(1)如图(1),纸片
为矩形,且
,
,点E,F分别为边
,
的中点,沿
将纸片剪成两部分,将纸片
沿纸片
的对角线
方向向上平移.
①当纸片
平移至点
与
的中点O重合时,两个纸片重叠部分
的面积与原矩形纸片
的面积之比是______.
②当两个纸片重叠部分
的面积与原矩形纸片
的面积之比是
时,则平移距离
为______.
【类比探究】
(2)如图(2),当纸片
为菱形,
,
时,将纸片
沿其对角线
剪开,将纸片
沿
方向向上平移.当两个纸片重叠部分
的面积与纸片
的面积之比为
时,求平移距离
(用含a的式子表示).
【拓展延伸】
(3)某小组将图(2)剪下来的
与图(1)中的四边形
按图(3)的方式放在同一平面内,使点L与点B重合,
与
重合.将
从如图(3)所示的起始位置开始绕B点逆时针旋转
,旋转过程中,边
与边
相交于点T,边
与边
相交于点S,连接
.请直接写出旋转过程中
,
,
之间的数量关系.
“综合与实践”课上,王老师带领同学们剪拼图形,用发展的眼光看问题,感受图形的变换美!
【特例感知】
(1)如图(1),纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac943d8c2eb91c0082ada87857d1ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94c5119a5d7197604b58e8025ca5ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6d456e2adab93eabc931b3227bb79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21002725043bdace95b3244d4c75dd74.png)
①当纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94c5119a5d7197604b58e8025ca5ae9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21002725043bdace95b3244d4c75dd74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761f984b8c8cb494c69ede2877804ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
②当两个纸片重叠部分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761f984b8c8cb494c69ede2877804ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8d1ca7682da10dc7f36e858593d51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827be85b8f921007a5cf9edb64bd3491.png)
【类比探究】
(2)如图(2),当纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72111572d7898e53fddf7a8cd49c510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d896cfc194941ef748be924df040dd5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772441094bf51a2c815c9f3a1d625730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72111572d7898e53fddf7a8cd49c510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990f13b38111f7195b356cc72287f690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b90fc2d3503ca51568a92374ae7f022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990f13b38111f7195b356cc72287f690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb72f5d18aa205904fffc46a8ec3f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b90fc2d3503ca51568a92374ae7f022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8236dc949c9138b6b01c9093b678ae.png)
【拓展延伸】
(3)某小组将图(2)剪下来的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140bca725eb48e1d187a79372f1691f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6d456e2adab93eabc931b3227bb79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f83c8c210a7e00e1594b7857dc96a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140bca725eb48e1d187a79372f1691f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f895ec9007b1dabc9d9dec9a307ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78324fc0f0ebc4e36e5a5af16483483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f83c8c210a7e00e1594b7857dc96a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4bab74b21722ce5f1d44a6e1de32b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0216422054380bcbd2dcbc38aac8ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6664180a5a14191295b419be0adb087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedc13a4c111aff86bf3485b239d9096.png)
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较难
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【推荐2】在“融学课堂”的实践中,李老师经常让学生以“问题”为中心进行自主合作探究学习.
【课堂提问】李老师在课堂上提出这样的问题:如图1,在
中,
,
,那么
和
有怎样的数量关系?
【互动生成】经小组合作交流后,各小组派代表发言.
(1)小华代表第3 小组发言:
.请你补全下面小华的证明过程.
证明:如图1,把
沿着
翻折,得到
,
,
,
即点 B,C,D 共线.
………
(2)受到第3小组“翻折”的启发,小明代表第2小组发言:如图 2,在
中,如果把条件“
”改为“
”保持“
”不变,且
,求
的长.
【能力迁移】我们发现,利用翻折可以探索图形性质,请利用翻折解决下面的问题.
(3)如图 3,点 D 是
内一点,
,
,
,求
、
、
三者之间的数量关系.
【课后拓展】
(4)如图4,在四边形
中,
,
,
,且
,请求出
的周长.
【课堂提问】李老师在课堂上提出这样的问题:如图1,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/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【互动生成】经小组合作交流后,各小组派代表发言.
(1)小华代表第3 小组发言:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5181b97a7e43959b8455680157c3b644.png)
证明:如图1,把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977b150d6e0baa9da024c7b664bc8316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2579599ceeb5f00925cd23a78bf341.png)
即点 B,C,D 共线.
………
(2)受到第3小组“翻折”的启发,小明代表第2小组发言:如图 2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a0946888ae70f1d37116c2d3867720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【能力迁移】我们发现,利用翻折可以探索图形性质,请利用翻折解决下面的问题.
(3)如图 3,点 D 是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f81b57605b3b6ebdde37d8357abb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a11eca1ec173dfcaccabb8fe2f7c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
【课后拓展】
(4)如图4,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b1860b6081e3f2d483c739cf14eb00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c1a54487628c86225d8e8c6c380ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3608a73313a6ca35861b9c38f7e3e2fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/475b15da-5bb8-4873-9650-9dac528e67f2.png?resizew=523)
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