名校
1 . 如图,在平面直角坐标系中,点O为坐标原点,AB∥OC,点B,C的坐标分别为(15,8),(21,0),动点M从点A沿A→B以每秒1个单位的速度运动;动点N从点C沿C→O以每秒2个单位的速度运动.M,N同时出发,设运动时间为t秒.
(1)在t=3时,M点坐标 ,N点坐标 ;
(2)当t为何值时,四边形OAMN是矩形?
(3)运动过程中,四边形MNCB能否为菱形?若能,求出t的值;若不能,说明理由.
(1)在t=3时,M点坐标 ,N点坐标 ;
(2)当t为何值时,四边形OAMN是矩形?
(3)运动过程中,四边形MNCB能否为菱形?若能,求出t的值;若不能,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/aa1b1c3e-c953-4a32-b55c-a4a3fb83c34d.png?resizew=261)
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7卷引用:河南省洛阳市洛阳外国语学校2018-2019学年八年级下期5月月考数学试题
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2 . 如图,在矩形
中,
,
,点
在边
上,若
平分
,则
( )
![](https://img.xkw.com/dksih/QBM/2021/5/16/2722031493324800/2723264394944512/STEM/750953e3334642c993eb5709c7e3a9a7.png?resizew=206)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.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/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3de20ba8bda63c650ef571be155702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f76e37d6e6b182896ccaaa187cfe07.png)
![](https://img.xkw.com/dksih/QBM/2021/5/16/2722031493324800/2723264394944512/STEM/750953e3334642c993eb5709c7e3a9a7.png?resizew=206)
A.![]() | B.![]() | C.![]() | D.![]() |
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9卷引用:【校级联考】陕西省宝鸡市岐山县2018届九年级第二次中考模拟数学试题
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3 . 四边形ABCD是矩形,点E在线段CB的延长线上,连接DE交AB于点F,∠AED=2∠CED,点G是DF的中点.BE=1,AG=4,则CD=_____ .
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712432082952192/2715929442582528/STEM/f7efc58584a4443dba22f83b86003782.png?resizew=179)
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3卷引用:黑龙江省大庆市第六十九中学2020-2021学年上学期初四年级第四次月考数学试题
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4 . 如图,在
中,
,
,
,
为边
上一动点,
于
,
于
,连接
,则
的最小值为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fae188b381c5ba01b3d9d742c687dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf2732c063f01d83e8f7cfc2b138732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/2021/4/20/2703466816954368/2710208381009920/STEM/14c2702b801941e1b1bd3fcb3d49aca9.png?resizew=189)
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18卷引用:江苏省扬州市江都区国际学校2017-2018学年八年级下学期第一次月考数学试题
江苏省扬州市江都区国际学校2017-2018学年八年级下学期第一次月考数学试题海南省海口市第十四中学2018-2019学年八年级下学期第二次月考数学试题广东省深圳市龙岗区龙岗区智民实验学校2019-2020学年九年级上学期12月月考数学试题山东省枣庄市薛城区奚仲中学、枣庄二十九中学、北临城中学等五校2020-2021学年九年级上学期12月联考数学试题人教版数学八年级下册 第十八章 平行四边形 特殊平行四边形的性质与判定 专题练习【区级联考】江苏省宿迁市湖滨新区2018—2019学年八年级第二学期期中调研试卷数学试题【校级联考】江苏省淮安市洪泽区教育联盟校2018-2019学年八年级下学期期中考试数学试题【区级联考】江苏省宿迁市湖滨新区2018-2019学年八年级(下)期中数学试题【区级联考】江苏省淮安市洪泽区苏科版2018-2019学年八年级(下)期中数学试题安徽省潜山市第四中学2019届九年级下学期第三次检测数学试题【校级联考】山东省日照市莒县2018-2019学年八年级(下)期中数学试题2020年山东省东营市利津县九年级中考一模数学试题山东省济宁市泗水县2019-2020学年八年级下学期期末数学试题湖南省长沙市湖南师大附中梅溪湖中学2021-2022学年八年级下学期第一次月考数学试题江苏省徐州市2020-2021学年八年级下学期期中数学试题福建省三明市将乐县2021-2022学年九年级上学期期中数学试题福建省泉州市安溪县2021-2022学年八年级下学期期末数学试题湖北省随州市广水市协作区2020-2021学年下学期八年级期中数学试题
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5 . 如图是某个球放进盒子内的截面图,球的一部分露出盒子外,已知⊙O交矩形ABCD的边AD于点E,F,已知AB=EF=2,则球的半径长为( )
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705060083359744/2706220406964224/STEM/2b21bc6068c64fedb35a79db21700cd5.png?resizew=192)
![](https://img.xkw.com/dksih/QBM/2021/4/22/2705060083359744/2706220406964224/STEM/2b21bc6068c64fedb35a79db21700cd5.png?resizew=192)
A.![]() | B.![]() | C.![]() | D.![]() |
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|
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3卷引用:黑龙江省大庆市第六十九中学2020-2021学年上学期初四年级第四次月考数学试题
6 . 在平面直角坐标系中,点
为坐标原点,抛物线
交
轴负半轴于点
,交
轴正半轴于点
,交
轴于点
,且
.
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699678655799296/2702344993456128/STEM/402241b3-85cc-461e-829d-bd7b2983dc3a.png)
(1)求这个抛物线的解析式;
(2)如图1,点
为第三象限抛物线上的点,设点
的横坐标为
,
面积
,求
与
的函数解析式(直接写出自变量
的取值范围);
(3)如图2,在(2)的条件下,
为
延长线上的一点,若
到
轴的距离为
,
的面积为
,且
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9985ad1358d0fddcb8bfc99deb95bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cbf4a0b81b41ba29296e3ea58e1e17.png)
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699678655799296/2702344993456128/STEM/402241b3-85cc-461e-829d-bd7b2983dc3a.png)
(1)求这个抛物线的解析式;
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图2,在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a551505ae42b49904bab59b17012d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57124599d0a72bf788f08ce442a85600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e705de89b12d92bfe47a88a8d201db6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2卷引用:广东省湛江市霞山区智洋学校2020-2021学年八年级上学期10月月考数学试题
7 . 如图,在
中,高
和
交于点
,且
.①
;②
;③
;④若
于点
,则
.其中正确的有________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda4378ca481a0894e1309ceea6cd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a28fec6159242405aa5d47e94fcaceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd1a61aa70eecddaaab88c5941972d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9677deecea626aa6e4078f0b532ba68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a3b986fb79bc9af39efe85e2c512be.png)
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680302237573120/2683393690263552/STEM/6b0ade70-d422-4590-93b8-ab16504585ba.png?resizew=181)
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2卷引用:四川省成都市天府第七中学2019~2020年七年级下学期期中数学试题
8 . 在四边形
中,
,
.
![](https://img.xkw.com/dksih/QBM/2021/3/15/2678253770194944/2678293031444480/STEM/8bd461b7-3106-4622-81b6-20a58cf5d24e.png)
(1)P为边
上一点,如图,将
沿直线
翻折至
的位置(点B落在点E处)
①当点E落在
边上时,利用尺规作图,作出满足条件的图形,并直接写出此时
_________;
②若点P为
边的中点,连接
,则
与
有何位置关系?请说明理由;
(2)点Q为射线
上的一个动点,将
沿
翻折,点D恰好落在直线
上的点
处,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529188246973b6851b114466a238fc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900d409ddc0930a9c560152f78352305.png)
![](https://img.xkw.com/dksih/QBM/2021/3/15/2678253770194944/2678293031444480/STEM/8bd461b7-3106-4622-81b6-20a58cf5d24e.png)
(1)P为边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
①当点E落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
②若点P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)点Q为射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41984f53bb280ba8b5ac00a52ce2825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
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9 . 菱形OABC在平面直角坐标系中的位置如图所示,点A在x轴上,点B、C均在第一象限,若∠AOC=45°,OC=
,则点B的横坐标为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2021/3/10/2674654093180928/2675093675630592/STEM/d4dccf7f-d42c-4ee4-b49e-2e267bfefc73.png?resizew=207)
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10 . 如图,已知菱形
的对角线
,
交于点
,分别过点
,
作
,
的垂线,两垂线交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/bf91d4c2-3901-4721-afad-93e9587d115b.png?resizew=155)
(1)请判断四边形
的形状并给出证明;
(2)若四边形
的面积为12,点
是四边形
对角线
的中点,且
,请计算四边形
的周长.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/bf91d4c2-3901-4721-afad-93e9587d115b.png?resizew=155)
(1)请判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3827554ef88bce8ae0e3755b07443080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
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2021-03-08更新
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247次组卷
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2卷引用:河南省郑州市新郑市2020-2021学年九年级上学期期中数学试题