综合与探究
【特例感知】
(1)如图1,E是正方形
外一点,将线段
绕点A顺时针旋转
得到
,连接
.求证:
;
【类比迁移】
(2)如图2,在菱形
中,
,P是
的中点,将线段
分别绕点P顺时针旋转
得到
,
交
于点G,连接
,求四边形
的面积;
【拓展提升】
(3)如图3,在平行四边形
中,
,∠B为锐角且满足
. P是射线
上一动点,点C、D同时绕点P顺时针旋转
得到点
,当△
为直角三角形时,直接写出
的长.
【特例感知】
(1)如图1,E是正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e825678030322bf7eb2f0249bf28ae25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d1125b47dec1c5e93143ee59ad862a.png)
【类比迁移】
(2)如图2,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62143af76a440e9ba090ab9b7c0c15b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6b04dcd5a34b8125696faf552ab63f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053b1c65cf03309f34a5500a5cf4ee6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f128427e0e7632e6394dc8896d45e45a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920ae90193d50ae60beafae6f2b4ebcd.png)
【拓展提升】
(3)如图3,在平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b358fb0a4ec02636c4b62f2346a88f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905f306dc08525842a96cfcab32c1ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec31993c8b7cc5d9dd091fa67b0ef4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a613c5fbd0d9ebb8f2e01563e5a9c792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
更新时间:2024-05-06 22:11:31
|
相似题推荐
解答题-问答题
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【推荐1】如图,在
中,∠C=90°,AC=3,AB=5,点P从点C出发沿CA以每秒1个单位长的速度向点A匀速运动;点Q从点A出发沿AB以每秒1个单位长的速度向点B匀速运动.伴随着P、Q的运动,DE始终保持垂直平分PQ,且交PQ于点D,交BC于点E.点P、Q同时出发,当点P到达点A时停止运动,点Q也随之停止.设点P、Q运动的时间是t秒(t>0).
(1)当t为何值时,
?
(2)求四边形BQPC的面积S与t的函数关系式;
(3)是否存在某一时刻t,使四边形BQPC的面积与
的面积比为13:15?若存在,求t的值.若不存在,请说明理由;
(4)若DE经过点C,试求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
(1)当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0137c721b8d4ea6dca8b7d9761134726.png)
(2)求四边形BQPC的面积S与t的函数关系式;
(3)是否存在某一时刻t,使四边形BQPC的面积与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
(4)若DE经过点C,试求t的值.
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595590110732288/2598432674627584/STEM/636685273f3c4bf1968b725b1e5f24af.png?resizew=205)
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【推荐2】如图,用同样规格的规格黑白两色正方形瓷砖铺设矩形地面,请观察下列图形并解答有关问题.
(1)在第n个图中,每一横行共有_______块瓷砖,每竖行共有_______块瓷砖(均用含n的代数式表示);
(2)设铺设地面所用的瓷砖总块数y,写出y与n的函数关系式(不写n的取值范围);
(3)按上述铺设方案,铺一块这样的地面共有528块瓷砖,求此时n的值.
(1)在第n个图中,每一横行共有_______块瓷砖,每竖行共有_______块瓷砖(均用含n的代数式表示);
(2)设铺设地面所用的瓷砖总块数y,写出y与n的函数关系式(不写n的取值范围);
(3)按上述铺设方案,铺一块这样的地面共有528块瓷砖,求此时n的值.
![](https://img.xkw.com/dksih/QBM/2015/12/15/1573941941403648/1573941947711488/STEM/414e511d7bd64895a67046f6a454f8eb.png)
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解答题-作图题
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较难
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【推荐1】如图,在平面直角坐标系
中,点A的坐标为
.
![](https://img.xkw.com/dksih/QBM/2023/5/5/3231211817959424/3233844484775936/STEM/d25911f10a9445a9825222fe3957c2d5.png?resizew=153)
(1)尺规作图,作菱形
,使得
且点C,D在第一象限内(保留作图痕迹,不要求写作法);
(2)菱形
的两条对角线交点为M,用钉把一根平放在菱形上的直细木条(把细木条数学化为线段)固定在点M处,并使细木条可以绕点M转动.拨动细木条,使它与
的延长线交于点F,当
是等腰三角形时,求细木条与
边的交点B的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96877d6f386a9883ce1a173ffb66b3ab.png)
![](https://img.xkw.com/dksih/QBM/2023/5/5/3231211817959424/3233844484775936/STEM/d25911f10a9445a9825222fe3957c2d5.png?resizew=153)
(1)尺规作图,作菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a88e0655c20c497115bfb4fd84fe7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c3b184adb06f96bacedc27c6b21b6c.png)
(2)菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14c88a2d38002254d1680dabde29e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c3b743769d19231c2165ec275bab1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
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真题
解题方法
【推荐2】已知,△ABC为等边三角形,点D为直线BC上一动点(点D不与B、C重合).以
AD为边作菱形ADEF,使∠DAF=60°,连接CF.
⑴如图1,当点D在边BC上时,
①求证:∠ADB=∠AFC;②请直接判断结论∠AFC=∠ACB+∠DAC是否成立;
⑵如图2,当点D在边BC的延长线上时,其他条件不变,结论∠AFC=∠ACB+∠DAC是否成立?请写出∠AFC、∠ACB、∠DAC之间存在的数量关系,并写出证明过程;
⑶如图3,当点D在边CB的延长线上时,且点A、F分别在直线BC的异侧,其他条件不变,请补全图形,并直接写出∠AFC、∠ACB、∠DAC之间存在的等量关系.
AD为边作菱形ADEF,使∠DAF=60°,连接CF.
⑴如图1,当点D在边BC上时,
①求证:∠ADB=∠AFC;②请直接判断结论∠AFC=∠ACB+∠DAC是否成立;
⑵如图2,当点D在边BC的延长线上时,其他条件不变,结论∠AFC=∠ACB+∠DAC是否成立?请写出∠AFC、∠ACB、∠DAC之间存在的数量关系,并写出证明过程;
⑶如图3,当点D在边CB的延长线上时,且点A、F分别在直线BC的异侧,其他条件不变,请补全图形,并直接写出∠AFC、∠ACB、∠DAC之间存在的等量关系.
![](https://img.xkw.com/dksih/QBM/2011/7/7/1573221818458112/1573221869813760/STEM/2a2cf7808aa84064bd74d398fd836cde.png?resizew=424)
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解答题-作图题
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名校
【推荐1】如图,在7×7的网格中,每个小正方形的边长为1,△ABC的顶点均在格点上.仅用无刻度的直尺,试按要求作图.画图过程用虚线表示,画图结果用实线表示.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939470253678592/2942274812076032/STEM/4d7e8dd9-30a2-4e21-ad89-a0a4a7afd5bc.png?resizew=626)
(1)如图1,在BC作一点D,使得
;
(2)如图2,E为△ABC内一格点,M,N为AB,BC边上的点,使四边形EMBN为平行四边形;
(3)如图3,BC交网格线于点F,过点F作AB的平行线交AC于P.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939470253678592/2942274812076032/STEM/4d7e8dd9-30a2-4e21-ad89-a0a4a7afd5bc.png?resizew=626)
(1)如图1,在BC作一点D,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0cf3de61b5492989ae2002e19de770a.png)
(2)如图2,E为△ABC内一格点,M,N为AB,BC边上的点,使四边形EMBN为平行四边形;
(3)如图3,BC交网格线于点F,过点F作AB的平行线交AC于P.
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【推荐2】如图,在平面直角坐标系xOy中,直线y=﹣
x+4与x轴、y轴分别交于A、C两点,抛物线y=﹣
x2+bx+c经过A、C两点.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424499965952/2927555874242560/STEM/2fe0e5bd-2e80-4852-be80-2cab35083a6c.png?resizew=407)
(1)求抛物线的解析式;
(2)点B为y轴上一点,点P为直线AB上一点,过P作PQ∥BC交x轴于点Q,当四边形BCPQ为菱形时,请直接写出B点坐标;
(3)在(2)的条件下,且点B在线段OC上时,将抛物线y=﹣
x2+bx+c向上平移m个单位,平移后的抛物线与直线AB交于点D(点D在第二象限),点N为x轴上一点,若∠DNB=90°,且符合条件的点N恰好有2个,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424499965952/2927555874242560/STEM/2fe0e5bd-2e80-4852-be80-2cab35083a6c.png?resizew=407)
(1)求抛物线的解析式;
(2)点B为y轴上一点,点P为直线AB上一点,过P作PQ∥BC交x轴于点Q,当四边形BCPQ为菱形时,请直接写出B点坐标;
(3)在(2)的条件下,且点B在线段OC上时,将抛物线y=﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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【推荐3】综合与探究
问题背景:如图3,四边形
是矩形,
,点G、H、E分别是线段
、
、
上的动点,连接
,过点E作
的垂线交线段
于点F(只考虑F在
上的情况)
(1)①如图1,当点G运动到A点,点E运动到B点时,若
,
,
,则
的值为______(直接写答案)
②如图2,当点G不与A点重合,点E运动到B点时,若
,试求
的值.
问题探究:
(2)如图3,当G不与A重合,E不与B重合时,用含m的式子表示
的值.
问题拓展:
(3)如图4,将背景问题中的矩形改成已知“在四边形
中,
,
,
,
,则
的值为______.(直接写答案)
问题背景:如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b173a10a2b90f72b81fa8068c131c748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/10/8cc89dc1-3836-4338-80f9-b3872b7a0b54.png?resizew=403)
(1)①如图1,当点G运动到A点,点E运动到B点时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1372b37a2e2f043eb50ef84b72e80bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d037de406a2d83916265797e57e89db4.png)
②如图2,当点G不与A点重合,点E运动到B点时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09657d9ae592fe8dbd1b1c098ce4e.png)
问题探究:
(2)如图3,当G不与A重合,E不与B重合时,用含m的式子表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4536afbc48f0171e85382513dd6877be.png)
问题拓展:
(3)如图4,将背景问题中的矩形改成已知“在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99338ef1ae47e7367677c03f15b92b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2c71cabd795b066e30292e95b27d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a4f343b979b671fdc1817015db975d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa7c01e1f2f6bced0fd830aec1f45a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09657d9ae592fe8dbd1b1c098ce4e.png)
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【推荐1】如图1,点C是半圆
上一点(不与A,B重合),O为圆心,
交弧
于点D,交弦
于点E,连接
交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/800272c5-c1a9-4226-984c-8a6159d2b4bb.png?resizew=524)
(1)如图1,如果
,求
的大小;
(2)如图2,如果
,求
的值;
(3)连接
,若圆O的直径为4,当
是等腰三角形时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7251d14111473460f02a65c7531c51f.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/800272c5-c1a9-4226-984c-8a6159d2b4bb.png?resizew=524)
(1)如图1,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)如图2,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c56b9bf310c1d109fb73db18e3d6c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3281279fd172040eadc139ee61581a5a.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404d3156fe594d861d976f09c18ecd29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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名校
【推荐2】在△ABC中,
,
,点M,N分别是AC,BC的中点,点P是直线MN上一点,连接AP,将线段PA绕点P顺时针旋转
得到线段PQ,连接AQ,CQ.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2973399793041408/2982136195915776/STEM/9c3a7f49cf924100992cd6d1744e36f9.png?resizew=430)
(1)【问题发现】如图1,当点P与点M重合时,线段CQ与PN的数量关系是 ,∠ACQ= °.
(2)【探究证明】当点P在射线MN上运动时(不与点N重合),(1)中结论是否一定成立?请利用图2中的情形给出证明.
(3)连接PC,当△PCQ是等边三角形时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2973399793041408/2982136195915776/STEM/9c3a7f49cf924100992cd6d1744e36f9.png?resizew=430)
(1)【问题发现】如图1,当点P与点M重合时,线段CQ与PN的数量关系是 ,∠ACQ= °.
(2)【探究证明】当点P在射线MN上运动时(不与点N重合),(1)中结论是否一定成立?请利用图2中的情形给出证明.
(3)连接PC,当△PCQ是等边三角形时,请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9152b9d571e4a595e63ab4a6c3505a.png)
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