1 . 如图,在菱形ABCD中,对角线AC,BD相交于点O,且
,
,点M从点B出发,沿着BA方向匀速运动,速度为1cm/s;同时,直线PQ从点D出发,沿着DB方向匀速移动,速度为1cm/s.PQ
AC且分别与AD、BD、DC交于点P、N、Q;当直线PQ停止移动时,点M也停止运动,连接MQ,设运动时间为t(s)(
),请解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992583942144000/2996123501281280/STEM/61dfefd86ea841838a36bd3dd19b7ac2.png?resizew=478)
(1)用含t的代数式表示DQ.
(2)t为何值时,四边形AMQD是平行四边形?
(3)是否存在t,使得四边形AMQP面积最大?若存在,求出t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafddfd80f69337909f6eac0f0dbfd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1337ce85d29edabcc2fadb9a9cc31ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0fed6f944ef4b07f7e33ca893581fa.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992583942144000/2996123501281280/STEM/61dfefd86ea841838a36bd3dd19b7ac2.png?resizew=478)
(1)用含t的代数式表示DQ.
(2)t为何值时,四边形AMQD是平行四边形?
(3)是否存在t,使得四边形AMQP面积最大?若存在,求出t的值;若不存在,请说明理由.
您最近一年使用:0次
2 . 如图,
为
的内接三角形,过点B作
,交
于点E,交AC的延长线于点D,在线段CD上取一点F,使得
.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992746116136960/2994664551063552/STEM/5caef92a-4843-4af0-933a-65ac9d8a333b.png?resizew=196)
(1)求证:EF是
的切线;
(2)若
的半径为
,
,求AC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b455b110a30c1533d0a0657e0e48ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec5705dfd0b80b75452f66c42199836.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992746116136960/2994664551063552/STEM/5caef92a-4843-4af0-933a-65ac9d8a333b.png?resizew=196)
(1)求证:EF是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
您最近一年使用:0次
3 . 如图,在正方形ABCD中,点E是边BC的中点,连接AE、DE,分别交BD、AC于点P、Q,过点P作
交CB的延长线于F.下列结论:①
;②
;③
;④若四边形OPEQ的面积为4,则该正方形ABCD的面积为36;⑤
.其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992746116136960/2994664549908480/STEM/53359fd6-ca49-4722-a0da-b0fb2f704f67.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c66902c5f7d00de2e4ba9ccfcfd759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6196604433130cca2b7271e35d48f260.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d383113c73c10c13c88a22df2f31a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e9fc260122d04a1b0df2cd0ce606b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c9aaaab6c4fe9d525278ad6e67570c.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992746116136960/2994664549908480/STEM/53359fd6-ca49-4722-a0da-b0fb2f704f67.png?resizew=163)
A.①②③④ | B.①③④⑤ | C.①②④⑤ | D.①②③⑤ |
您最近一年使用:0次
4 . 已知抛物线
与x轴交于点
,
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806576640000/2992661428174848/STEM/66800771-ff0e-44c0-bc9b-1da856c411d1.png?resizew=372)
(1)求抛物线的函数解析式.
(2)如图1,点D在抛物线上,过点D作
轴,交直线BC于点E,交x轴于点F,设点D的横坐标为m,且
,求线段DE长度的最大值.
(3)如图2,设M为抛物线的顶点,
,在y轴上是否存在点Q,使得
?若存在,求出点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806576640000/2992661428174848/STEM/66800771-ff0e-44c0-bc9b-1da856c411d1.png?resizew=372)
(1)求抛物线的函数解析式.
(2)如图1,点D在抛物线上,过点D作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010989c488d7f0551c9f2aa8bba6bf1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1464ddc459a7d19e2ff4e322c171e123.png)
(3)如图2,设M为抛物线的顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecab76dc432d7571230ae427262c222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caeeab8917ab89f1379d9b846653b463.png)
您最近一年使用:0次
5 . 如图,在△ABC中BC<AC,∠A+∠C=60°,点D在BC上,点E在AC上,连接DE,∠ABC=∠DEC,过点B作BF⊥AC于点F.若DB=AB,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806576640000/2992661427109888/STEM/42c268a6-db7e-40c1-95d6-248658f7503d.png?resizew=281)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae9da6f83c6fd6b062893b2a86755aa.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987806576640000/2992661427109888/STEM/42c268a6-db7e-40c1-95d6-248658f7503d.png?resizew=281)
A.1 | B.2 | C.![]() | D.![]() |
您最近一年使用:0次
6 . 如图,在Rt△ABC中,∠ABC=90°,以BC边的中点O为圆心,
BC为半径作圆,点D是⊙O上一动点,点E是弦CD的中点,连接AE,若BC=4,AB=3,则AE+
BE的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb84f6fbac102ccf326b2223d69cb7cc.png)
![](https://img.xkw.com/dksih/QBM/2022/5/23/2985697865170944/2991237720801280/STEM/de15e49b-861b-48a2-8f58-273517f19eba.png?resizew=242)
您最近一年使用:0次
7 . 如图,已知二次函数
的图象经过点
且与x轴交于原点及点
,顶点为A.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/e79b0960-d952-4ccc-8208-196777cdd8f1.png?resizew=166)
(1)求二次函数的表达式;
(2)判断
的形状,试说明理由;
(3)若点P为
上的动点,且
的半径为
,一动点E从点A出发,以每秒2个单位长度的速度沿线段
匀速运动到点P,再以每秒1个单位长度的速度沿线段
匀速运动到点B后停止运动,求点E的运动时间t的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ae77c8c436232bb6f0ddd2b95d968c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c95911ef9acebacd76928e930bf37d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd58ef950ddec3eb3ebf8e64f6228ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/e79b0960-d952-4ccc-8208-196777cdd8f1.png?resizew=166)
(1)求二次函数的表达式;
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
(3)若点P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fdb5584c8adfe3e2ce8670753c3846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
您最近一年使用:0次
8 . 如图,
为
上一点,点
在直径
的延长线上,
.
的平分线
交
于点
,交
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/5/30/2990549055741952/2991068818038784/STEM/97e13e18-7fcf-4b64-833d-8435909fbd93.png?resizew=235)
(1)判断直线
与
的位置关系,请说明理由;
(2)若
,
,求
的值.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f37eb7f363ef89c743b86dfbf51231ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2022/5/30/2990549055741952/2991068818038784/STEM/97e13e18-7fcf-4b64-833d-8435909fbd93.png?resizew=235)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a243aa38bf1ac88394f657473f98ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
2022-05-31更新
|
87次组卷
|
2卷引用:2022年贵州省铜仁市沿河县中考二模数学试卷
9 . 某校数学兴趣学习小组在一次活动中,对一些特殊几何图形具有的性质进行了如下探究:
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987836066627584/2989662813904896/STEM/615591b2-412d-4071-a9b3-a4f34f18eb95.png?resizew=931)
(1)发现问题:如图1,在等腰
中,
,点
是边
上任意一点,连接
,以
为腰作等腰
,使
,∠MAN=∠BAC,连接
.求证:
.
(2)类比探究:如图2,在等腰
中,
,
,
,点
是边
上任意一点,以
为腰作等腰
,使
,
.在点
运动过程中,
是否存在最小值?若存在,求出最小值,若不存在,请说明理由.
(3)拓展应用:如图3,在正方形
中,点
是边
上一点,以
为边作正方形
,
是正方形
的中心,连接
.若正方形
的边长为6,
,求
的面积.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987836066627584/2989662813904896/STEM/615591b2-412d-4071-a9b3-a4f34f18eb95.png?resizew=931)
(1)发现问题:如图1,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765917637583d22a579ff075f9baa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0eef65b7d4459a21b2e8a04b26f58e6.png)
(2)类比探究:如图2,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965f4956928390099975a610bd0d8514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3120ed27a38e603da96b23aab70dfb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
(3)拓展应用:如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5693553cd6992eda2b827fd73fb73766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c768dedaea22607617398ce28a02dd8.png)
您最近一年使用:0次
2022-05-29更新
|
284次组卷
|
2卷引用:2022年贵州省遵义市新蒲新区初中生毕业认定测试(三模)数学试卷
10 . 如图,在
中,
,以
为直径的
交
于点
,过点
作
,垂足为
,交
的延长线于
,过点
作
,垂足为
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983678201692160/2988470978535424/STEM/031bb975-e8bd-4e4a-91cf-b8bb4d7d1243.png?resizew=211)
(1)求证:直线
是
的切线;
(2)求证:
;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/66fae8e33cd86fa8dab72704eaafe1ba.png)
![](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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4251c1b27b6a227a8705e61bdc6bd61f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983678201692160/2988470978535424/STEM/031bb975-e8bd-4e4a-91cf-b8bb4d7d1243.png?resizew=211)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5244bcc63eb649b2a980c616c60af7.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf56410856392bb63ae36e3bd551835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc244d699f220ab257a891c95b8e7394.png)
您最近一年使用:0次
2022-05-27更新
|
177次组卷
|
2卷引用:2022年贵州省毕节市七星关区中考数学二轮模拟试题