如图,在矩形
中,
,
,点
在对角线
上(不与点
、
重合),以
为圆心,以
为半径作圆
交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/4/24/2706666699587584/2709095987142656/STEM/9da15381-2957-4a0c-be8d-77679a89804f.png?resizew=229)
(1)
______;
(2)若圆
经过点
,求圆
的面积;
(3)若圆
与
的边所在直线相切,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/4/24/2706666699587584/2709095987142656/STEM/9da15381-2957-4a0c-be8d-77679a89804f.png?resizew=229)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc7aa1208ad706c46b37453e3087a90.png)
(2)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(3)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
2021·河北邢台·一模 查看更多[2]
更新时间:2021-04-27 22:52:48
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相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在四边形
中,
,
,
,
,点
从点
出发,沿
方向匀速运动,速度为
;同时,点
从点
出发,沿
方向匀速运动,速度为
.过点
作
,垂足为
,
与
相交于点
,连结
.设运动时间为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
.解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/7ee63054-cc44-4cd6-be47-ea349832e7a4.png?resizew=125)
(1)求
的长度(用含
的代数式表示);
(2)当
时,求
的值;
(3)设四边形
的而积为
,求
与
之间的关系式;
(4)在运动过程中,是否存在某一时刻
,使得以点
,
,
,
为顶点的四边形为平行四边形?若存在,请直接写出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d730ae4307db56b47849c3a19dedfb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc125a291f12356b3c0b5f1e8f2c3617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ba3109534912d40dc277aa0c2a8fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca07a30fd25907fbb2f54e0d639b512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d441a4da05f88e5116a7a5e4146156f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/7ee63054-cc44-4cd6-be47-ea349832e7a4.png?resizew=125)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7581244889926c9cbed07f0039d5900c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5979f482717106c8076df030c3878acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab9091bc1886a3fd3d17160b2d41ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)在运动过程中,是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】已知:如图1,
中,
,
,动点P从点C出发沿线段
以
的速度向点B运动,同时动点Q从点B出发沿线段
以
的速度向点A运动,当其中一个动点停止运动时另一个动点也随之停止,设运动时间为t
,以点Q为圆心,
长为半径的圆Q与射线
、线段
分别交于点D、E.
尝试:当
是等腰三角形时,求t的值;
探究:设
,求
与t的函数解析式,且写出t的取值范围;
拓展:如图2,连接
,当t为何值时,线段
与
相切?
延伸:如图2,若
与线段
只有一个公共点,求t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011586f46c6f0c37d0f2e85fb69bb4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9d0d90bf492735a174a88df5704f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42670ba76f7d6667851b86772eec24f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c34fb6c0a25aca680a1bec273244cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
尝试:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
探究:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e83115ca0edf2fedb181bb960f3efde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
拓展:如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
延伸:如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/1/bc0906d3-1a8e-4fc7-b02a-390a53788252.png?resizew=387)
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【推荐1】如图,在平面直角坐标系中,抛物线y=ax2﹣x+c(a≠0)与x轴交于点A、B两点(点A在点B左侧),与y轴交于点C.OA、OB的长是不等式组
的整数解(OA<OB),点D(2,m)在抛物线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/2acfcedd-8448-4ff2-a6f7-b5fb738d8af7.png?resizew=207)
(1)求抛物线的解析式及m的值;
(2)y轴上的点E,使AE和DE的值最小,则OE= ;
(3)将抛物线向上平移,使点C落在点F处.当AD∥FB时,抛物线向上平移了 个单位;
(4)点M在y轴上,平面直角坐标系内存在点N使以点A、B、M、N为顶点的四边形为菱形,请直接写出点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057bd6f6fc6969331c7bcd67d710f1ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/2acfcedd-8448-4ff2-a6f7-b5fb738d8af7.png?resizew=207)
(1)求抛物线的解析式及m的值;
(2)y轴上的点E,使AE和DE的值最小,则OE= ;
(3)将抛物线向上平移,使点C落在点F处.当AD∥FB时,抛物线向上平移了 个单位;
(4)点M在y轴上,平面直角坐标系内存在点N使以点A、B、M、N为顶点的四边形为菱形,请直接写出点N的坐标.
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名校
【推荐2】问题解决
(1)如图1,在等边三角形
中,点
,
分别在
,
边上,
,
交于点
,且
.则线段
,
的数量关系为__________,
的度数为__________;
类比迁移
(2)如图2,
是等腰直角三角形,
,点D,E分别在
,
边上,
,
交于点F,且
.
①判断线段
之间的数量关系并说明理由;
②求
的度数.
拓展探究
(3)如图3,
是等腰直角三角形,
,若点
是边
上一动点,点E是射线
上一动点,在(2)的条件下,当动点D沿
边从点A移动到点C(可以与点C重合)时,直接写出运动过程中
长的最大值和最小值.
(1)如图1,在等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
类比迁移
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74091b956eed8daa9f82cc4cdee1b602.png)
①判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87aab936ef1ddeaab717bc3d07a2c046.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
拓展探究
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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解答题-证明题
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【推荐1】如图,抛物线y=x2+bx+c与x轴交于A、B两点(点A在B左边),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/a1763665-edf7-4890-bfdc-738994deef29.png?resizew=149)
(1)若A(﹣1,0),B(3,0)两点,求该抛物线的解析式;
(2)在(1)中位于第四象限内的抛物线上是否存在点P,使得△PBC的面积最大?若存在,求出点P的坐标及△PBC的面积最大值;若没有,请说明理由;
(3)直线y=1与抛物线y=x2+bx+c交于抛物线对称轴右侧的点为点D,点E与点D关于x轴对称.试判断直线DB与直线AE的位置关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/a1763665-edf7-4890-bfdc-738994deef29.png?resizew=149)
(1)若A(﹣1,0),B(3,0)两点,求该抛物线的解析式;
(2)在(1)中位于第四象限内的抛物线上是否存在点P,使得△PBC的面积最大?若存在,求出点P的坐标及△PBC的面积最大值;若没有,请说明理由;
(3)直线y=1与抛物线y=x2+bx+c交于抛物线对称轴右侧的点为点D,点E与点D关于x轴对称.试判断直线DB与直线AE的位置关系,并证明你的结论.
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真题
【推荐2】平面上,矩形ABCD与直径为QP的半圆K如图摆放,分别延长DA和QP交于点O,且∠DOQ=60°,OQ=OD=3,OP=2,OA=AB=1.让线段OD及矩形ABCD位置固定,将线段OQ连带着半圆K一起绕着点O按逆时针方向形如旋转,设旋转角为α(0°≤α≤60°).
(2)在OQ旋转过程中.简要说明α是多少时,点P,A间的距离最小?并指出这个最小值:
(3)如图,当点P恰好落在BC边上时.求α及S阴影.
(2)在OQ旋转过程中.简要说明α是多少时,点P,A间的距离最小?并指出这个最小值:
(3)如图,当点P恰好落在BC边上时.求α及S阴影.
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【推荐1】如图,AB是⊙O的直径,BM切⊙O于点B,点P是⊙O上的一个动点(点P不与A,B两点重合),连接AP,过点O作OQ∥AP交BM于点Q,过点P作PE⊥AB于点C,交QO的延长线于点E,连接PQ,OP.
(1)求证:△BOQ≌△POQ;
(2)若直径AB的长为12.
①当PE= 时,四边形BOPQ为正方形;
②当PE= 时,四边形AEOP为菱形.
(1)求证:△BOQ≌△POQ;
(2)若直径AB的长为12.
①当PE= 时,四边形BOPQ为正方形;
②当PE= 时,四边形AEOP为菱形.
![](https://img.xkw.com/dksih/QBM/2020/4/6/2435436117532672/2435640748417024/STEM/cec8647f0a244b11956f8ee0eaba1352.png?resizew=161)
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解答题-问答题
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【推荐2】如图,已知在平行四边形ABCD中,AB=10,BC=16,cosB=
,点P是边BC上的动点,以CP为半径的圆C与边AD交于点E、F(点F在点E的右侧),射线CE与射线BA交于点G.
(1)当圆C经过点A时,求CP的长
(2)联结AP,当AP//CG时,求弦EF的长
(3)当△AGE是等腰三角形时,求圆C的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
(1)当圆C经过点A时,求CP的长
(2)联结AP,当AP//CG时,求弦EF的长
(3)当△AGE是等腰三角形时,求圆C的半径长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/c7aae619-c2ce-46ba-8f7c-62f1e7e80338.png?resizew=181)
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