已知,如图,O为坐标原点,四边形OABC为矩形,A(20,0),C(0,8),点D是OA的中点,动点P在线段BC上以每秒2个单位长的速度由点C向B 运动.设动点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/1c5a5786-adcd-4cc3-b3f2-15582ab5d24a.png?resizew=480)
(1)当t为何值时,四边形PODB是平行四边形?
(2)在直线CB上是否存在一点Q,使得O、D、Q、P四点为顶点的四边形是菱形?若存在,求t的值,并求出Q点的坐标;若不存在,请说明理由.
(3)在线段PB上有一点M,且PM=10,当P运动 秒时,四边形OAMP的周长最小, 并在图②画出点M的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/13/1c5a5786-adcd-4cc3-b3f2-15582ab5d24a.png?resizew=480)
(1)当t为何值时,四边形PODB是平行四边形?
(2)在直线CB上是否存在一点Q,使得O、D、Q、P四点为顶点的四边形是菱形?若存在,求t的值,并求出Q点的坐标;若不存在,请说明理由.
(3)在线段PB上有一点M,且PM=10,当P运动 秒时,四边形OAMP的周长最小, 并在图②画出点M的位置.
更新时间:2022-09-05 15:21:31
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解答题-证明题
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名校
【推荐1】如图,在平行四边形
中,对角线
相交于点O,
,点E是
的中点,过点E作
,交
于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/7deac7e9-751b-4d47-8e88-ecb96dac4888.png?resizew=195)
(1)求证:四边形
是矩形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c851c07c6e4b9a66e76168d6b16592e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/7deac7e9-751b-4d47-8e88-ecb96dac4888.png?resizew=195)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097b314ad75ff245de4e2298933c0195.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a642b8e5146ee499706a04c9bcb91936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】如图,矩形ABCO中,点C在x轴上,点A在y轴上,点B的坐标是
.矩形ABCO沿直线BD折叠,使得点A落在对角线OB上的点E处,折痕与OA、x轴分别交于点D、F.
(1)求点D的坐标;
(2)若点N是平面内任一点,在x轴上是否存在点M,使M、N、E、O为顶点的四边形是菱形?若存在,请直接写出满足条件的点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc35cbfb14b64b6a6f82d9f9133cd023.png)
(1)求点D的坐标;
(2)若点N是平面内任一点,在x轴上是否存在点M,使M、N、E、O为顶点的四边形是菱形?若存在,请直接写出满足条件的点M的坐标;若不存在,请说明理由.
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【推荐1】如图,直线y=2x与双曲线y=
交于点A,E,直线AB交双曲线于另一点B(2m,m),连接EB并延长交x轴于点F.
![](https://img.xkw.com/dksih/QBM/2019/8/4/2261718237388800/2263648266059776/STEM/71658d8f8ddf46e3af219d337ec796ca.png?resizew=206)
(1)求直线AB的解析式;
(2)求△EOF的面积;
(3)若点P为坐标平面内一点,且以A,B,E,P为顶点的四边形是平行四边形,请直接写出所有满足条件的点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47651f15eeed13a8035eaf5b9f384a9d.png)
![](https://img.xkw.com/dksih/QBM/2019/8/4/2261718237388800/2263648266059776/STEM/71658d8f8ddf46e3af219d337ec796ca.png?resizew=206)
(1)求直线AB的解析式;
(2)求△EOF的面积;
(3)若点P为坐标平面内一点,且以A,B,E,P为顶点的四边形是平行四边形,请直接写出所有满足条件的点P的坐标.
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【推荐2】如图1,已知直线
分别与双曲线
,
交于
,
两点,且点
的横坐标、纵坐标分别是点
的横坐标、纵坐标的2倍.
的值;
(2)如图2,若
是双曲线
上的动点,
轴,
轴,分别交双曲线
于
,
两点,连接
,设
点的横坐标为
.
①直接写出
,
,
的坐标,并求
的面积;
当
时,
为直线
上的一点,若以
,
,
,
为顶点的四边形是平行四边形,求
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cca39b30b0b8e769293e13546b91f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c5dbbd1a7f9932567099ee67f2443f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9940526785ca763da2dfa35e77c934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c5dbbd1a7f9932567099ee67f2443f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc195a9f7ac138e5a1ad87d5fa201c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f039f9bc9a11c801ae35be7de4115d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9940526785ca763da2dfa35e77c934.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
①直接写出
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐1】在
和
中,
,
,
,用这两个直角三角形研究图形的变换.
(1)如图1,将
沿线段
翻折,连接
,下列对所得四边形
的说法正确的是______.
①
平分
、
,②
、
互相平分,③
,④
、
、
、
四点共圆.
【平移】
(2)如图2,将
沿线段
向右平移,使
点移到
的中点,连接
、
、
,请猜想四边形
的形状,并说明理由.
【旋转】
(3)如图3,将
绕点
逆时针方向旋转,使
,连接
、
,则旋转角为______°,
______cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73fbc2f33d3402cd96a776a376d9835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3583715945d0dc645aee9aa778ab252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fbc42ea04e6ae3b868f218785c9bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8086e5521c613f6438322463290ccc0c.png)
(1)如图1,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a31c3a9dc3437c6309cec6486ce42c94.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d59511c474942171fb685fc3f8dfd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db0641078052bf1af17b4c5a01b9ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ae35bb97556d2967f5364b99f404d5.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
【平移】
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54f59859698f3cfdfe285b3cdb95125.png)
【旋转】
(3)如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca055fd598566ffc1cbae35b92f68f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ff731a6624a093d2b33f1314845afe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
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【推荐2】如图,
为
的直径,过圆外一点
作切线
交
于点
和点
,连接
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/f9c5a827-a25b-45ac-8229-1dfec2eb7ef8.png?resizew=95)
(1)求证:
;
(2)填空:①当
______
时,四边形
为菱形;
②当
______
时,四边形
为正方形.
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace5e8c3769ad8f370c86f879246c174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/cd90578baac2f81bba9a15dbd2fc74a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/f9c5a827-a25b-45ac-8229-1dfec2eb7ef8.png?resizew=95)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d786485cf63bca977290becd92c38c49.png)
(2)填空:①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927290f9edf39953ceda5d23b9660daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc2c2a75dcc424b8fb5d4683331df20.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927290f9edf39953ceda5d23b9660daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8720d005d4d86a6bedd5590ff4e92f6b.png)
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【推荐1】如图,在四边形AOBC中,AC∥OB,顶点O是原点,顶点A的坐标为(0,8),AC=24cm,OB=26cm,点P从点A出发,以1cm/s的速度向点C运动,点Q从点B同时出发,以3m/s的速度向点O运动.规定其中一个动点到达端点时,另一个动点也随之停止运动;从运动开始,设P(Q)点运动的时间为ts.
(1)求直线BC的函数解析式;
(2)当t为何值时,四边形AOQP是矩形?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/e159eb83-e8aa-49c4-b000-c5aa7fea273d.png?resizew=205)
(1)求直线BC的函数解析式;
(2)当t为何值时,四边形AOQP是矩形?
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【推荐2】如图,矩形ABCD中,AD=10,CD=15,E是边CD上一点,且DE=5,P是射线AD上一动点,过A,P,E三点的⊙O交直线AB于点F,连结PE,EF,PF,设AP=m.
(1)当m=6时,求AF的长.
(2)在点P的整个运动过程中.
①tan∠PFE的值是否改变?若不变,求出它的值;若改变,求出它的变化范围.
②当矩形ABCD恰好有2个顶点落在⊙O上时,求m的值.
(3)若点A,H关于点O成中心对称,连结EH,CH.当△CEH是等腰三角形时,求出所有符合条件的m的值.(直接写出答案即可)
(1)当m=6时,求AF的长.
(2)在点P的整个运动过程中.
①tan∠PFE的值是否改变?若不变,求出它的值;若改变,求出它的变化范围.
②当矩形ABCD恰好有2个顶点落在⊙O上时,求m的值.
(3)若点A,H关于点O成中心对称,连结EH,CH.当△CEH是等腰三角形时,求出所有符合条件的m的值.(直接写出答案即可)
![](https://img.xkw.com/dksih/QBM/2018/10/1/2043866718814208/2046498093359104/STEM/7aa4ec021850428ea963c02e7f8319cb.png?resizew=158)
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