如图,将矩形纸片
放在平面直角坐标系中,O为坐标原点.点A在y轴上,点C在x轴上,
的长是
的两个根,P是边
上的一点,将
沿
折叠,使点A落在
上的点Q处.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/55efd8e1-3f59-4a73-8a6d-36a85b68ef98.png?resizew=194)
(1)求点B的坐标;
(2)求直线
的解析式;
(3)点M在直线
上,点N在直线
上,是否存在点M,N,使以A,C.M,N为顶点的四边形是平行四边形?若存在,请直接写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d071d008cdc313f6ed16a602f8a9669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d10fe168089df2c652ef4f99ba2b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532d9de08698f61d7c010805c61a4ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/55efd8e1-3f59-4a73-8a6d-36a85b68ef98.png?resizew=194)
(1)求点B的坐标;
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)点M在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
2023·黑龙江佳木斯·一模 查看更多[3]
2023年黑龙江省佳木斯市中考一模数学试卷(已下线)期末压轴题专训40题(第十六、十七、十八、十九、二十章)-2022-2023学年八年级数学下册同步考点知识清单+例题讲解+课后练习(人教版)(已下线)(培优特训)专项19.3 一次函数与几何综合高分必刷-2022-2023学年八年级数学下册《同步考点解读·专题训练》(人教版)
更新时间:2023-04-28 18:30:54
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【推荐1】如图,直线y=﹣
x+4与x轴、y轴分别交于A,B两点,C是OB的中点,D是AB上一点,四边形OEDC是菱形,
(1)求A、C两点的坐标;
(2)求证:△BCD为等边三角形;
(3)请直接写出同时经过A、E两点的直线的函数表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(1)求A、C两点的坐标;
(2)求证:△BCD为等边三角形;
(3)请直接写出同时经过A、E两点的直线的函数表达式.
![](https://img.xkw.com/dksih/QBM/2019/7/9/2243271961796608/2244640622993408/STEM/b72f67d8e7cf40df8ada6463c2cda6be.png?resizew=156)
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【推荐2】如图1所示,小明家与学校之间有一超市.早上小明由家匀速行驶去学校(不在超市停留),放学后小明回家的速度比上学的速度每小时少2千米,设早上小明出发
小时后,到达离家
千米的地方,图2中的折线
表示
与
之间的函数关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/023ccd37-be2f-4703-9eed-bd66016bc40a.png?resizew=314)
(1)小明上学的速度为___________
;他在校时间为___________
;
(2)求线段
所表示的
与
之间的函数表达式;
(3)如果小明两次经过超市的时间间隔为
小时,那么超市离家多远?
(4)设小明离超市的距离为
千米,在图3中画出
关于x的函数图像.(在坐标轴上注明必要的时间与距离)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/023ccd37-be2f-4703-9eed-bd66016bc40a.png?resizew=314)
(1)小明上学的速度为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd9242efa2facde4d7c79ff0c1b00ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933311c0c090e1138e4dd388b7adf8a.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如果小明两次经过超市的时间间隔为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d236f3ed9fb0109e479b6ee80e8cd2.png)
(4)设小明离超市的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
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【推荐3】为了创建和谐宜居社区,某社区计划对面积为
的区域进行绿化.经投标,由甲、乙两个工程队来完成,若甲队每天能完成绿化的面积是乙队每天能完成绿化面积的2倍,并且在独立完成面积为
区域的绿化时,甲队比乙队少用3天.
(1)求甲、乙两工程队每天能完成绿化的面积;
(2)①设甲工程队施工x天,乙工程队施工y天,恰好完成
的绿化任务,则y与x的关系式为______.
②在①的条件下,若甲队每天绿化费用是
万元,乙队每天绿化费用为
万元,且甲乙两队施工的总天数不超过
天,则如何安排甲、乙两队施工的天数,使施工总费用最低?并求出最低费用.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1f5e7f88875edb2d6419cd21c3dbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a22ee0949571f4f5a756f81a84714b.png)
(1)求甲、乙两工程队每天能完成绿化的面积;
(2)①设甲工程队施工x天,乙工程队施工y天,恰好完成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1f5e7f88875edb2d6419cd21c3dbe4.png)
②在①的条件下,若甲队每天绿化费用是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5db9fa0bc36e2308bd3eecd5e78351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09b5f459f48a235b5152eab56aeaecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
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【推荐1】已知一次函数
的图像经过
两点.
(2)如图,点
是该一次函数的图像上一点,过
作
轴的垂线分别交经过点
的反比函数图像于
点和
点,以
为边的
的顶点
在
轴上,求出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730f8f239acc8c7120570eadcc08971f.png)
(2)如图,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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/94c905599045694c50d401bfc78c394f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b771ca64c9dd0e8574eeef392c7adb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
【推荐2】如图,在平行四边形ABCD中,CE⊥BC交AD于点E,连接BE,点F是BE上一点,连接CF.
(1)如图1,若∠ECD=30°,BC=BF=4,DC=2,求EF的长;
(2)如图2,若BC=EC,过点E作EM⊥CF,交CF延长线于点M,延长ME、CD相交于点G,连接BG交CM于点N,若CM=MG,求证:EG=2MN.
(1)如图1,若∠ECD=30°,BC=BF=4,DC=2,求EF的长;
(2)如图2,若BC=EC,过点E作EM⊥CF,交CF延长线于点M,延长ME、CD相交于点G,连接BG交CM于点N,若CM=MG,求证:EG=2MN.
![](https://img.xkw.com/dksih/QBM/2019/5/9/2200144255705088/2205651180404736/STEM/63d635d0e2874b2dbd7a51cd233cd097.png?resizew=267)
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【推荐1】在矩形
的
边上取一点
,将
沿
翻折,使点
恰好落在
边上点
处.
(1)如图1,若
,求
的度数;
,且
时,求
的长;
,与
的角平分线交于点
,
交
于点
,当
时,求
出的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e8c3cf4bbfa6e00d38761560ddc6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767d0c3438178a6aef406ef427a0c0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3ef51f5446987cd0c8e7e0a0f93233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d786ee723231d4ca87eb9d011a378b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9195cc8ffac4f9ebc364f97435148323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2465ee1fec12351943f15055dfd6ec73.png)
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【推荐2】如图1,矩形
的边
、
分别在
,
轴的正半轴上,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/1acaa9ba-666f-4c2c-89f9-5ee62d225953.png?resizew=299)
(1)求直线
的解析式;
(2)如图2,将矩形
沿某条直线折叠,使点
与点
重合,折痕交
于点
,交
于点
,求直线
的解析式;
(3)在(2)的条件下,点
在直线
上,在直线
上是否存在点
,使以点
、
、
、
为顶点的四边形是平行四边形?若存在,请求出点
坐标:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f561a36cc4c9293d8a63ee4e1a7146b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3fd00798e7ec50afafe7fa7a4f42e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/1acaa9ba-666f-4c2c-89f9-5ee62d225953.png?resizew=299)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)如图2,将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.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/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)在(2)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解答题-证明题
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【推荐1】课题学习:
【证明体验】
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/6476fcef-92b6-42f9-8a8a-63dc77240511.png?resizew=560)
(1)如图1,在四边形
中,点P为
上一点,
,求证:
.
【思考探究】
(2)如图2,在四边形
中,点P为
上一点,当
时,上述结论是否依然成立?说明理由.
【拓展延伸】
(3)请利用(1)(2)获得的经验解决问题:
如图3,在
中,
,
,以点A为直角顶点作等腰
.点D在
上,点E在
上,点F在
上,且
,若
,求
的长.
【证明体验】
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/31/6476fcef-92b6-42f9-8a8a-63dc77240511.png?resizew=560)
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7502d2b89b731a7c11faa97815d46d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c4bc1c164e8dd6747cf998b237ef90.png)
【思考探究】
(2)如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500244f771b0e34b7fd1970e6757e5d5.png)
【拓展延伸】
(3)请利用(1)(2)获得的经验解决问题:
如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,在△ABC中,AB=AC,BD=CD,CE⊥AB于E.求证:AD•BE=BD•CE.
![](https://img.xkw.com/dksih/QBM/2019/3/4/2153118668070912/2154662970630144/STEM/4a6aad48063341a2bb7b816979855a3e.png?resizew=108)
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