如图,在平面直角坐标系中,四边形
的顶点
是坐标原点,点
,
,
的坐标分别是
,
,
.有一动点
从点
出发,沿折线
运动,到达点
时停止运动.
(1)分别求
,
所在直线的函数解析式.
(2)当点
运动到
上时,若
与
的面积相等,求点
的坐标.
(3)当
的面积等于
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f114df5ceabdb7e5fd3fdad4eaf056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd3c3d3c30e1eaad642d67660c7bbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da665a09193daac29cc9704a4052fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8a17e3b5a57b084da89c7bb3efc3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/10/3e56eef1-d067-4719-b5ea-54399194d2ec.png?resizew=147)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当点
![](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/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9dc427a01582ec222446b352d40ab0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e61680ffc6f940bd5b8afda3ae9c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
22-23八年级下·陕西商洛·期末 查看更多[5]
陕西省商洛市商南县富水镇初级中学2022-2023学年八年级下学期期末数学试题(已下线)专题12.6 一次函数与几何知识的综合三大题型-2023-2024学年八年级数学上册举一反三系列(沪科版)(已下线)专题4.6 一次函数与几何知识的综合三大题型-2023-2024学年八年级数学上册举一反三系列(北师大版)(已下线)专题6.6 一次函数与几何知识的综合三大题型-2023-2024学年八年级数学上册举一反三系列(苏科版)(已下线)专题5.6 一次函数与几何知识的综合三大题型-2023-2024学年八年级数学上册举一反三系列(浙教版)
更新时间:2023-09-04 09:36:12
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【推荐1】如图,在平面直角坐标系中,函数
的图象分别交x轴、y轴于A、B两点,过点A作直线交y轴正半轴于点M,且点M为线段
的中点
(1)求直线
的解析式
(2)将
沿着
翻折,点B落在点
处,连接
,则四边形
的形状为
(3)若点H是直线
上的动点,在坐标平面内是否存在这样的点Q,使以A、B、Q、H为顶点的四边形是矩形?若存在,请直接写出点Q的坐标,若不存在,请说明理由
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12dcee216b8163926d78e80049ac12db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/79092a55-097f-4da1-bfaa-ccf59f601032.png?resizew=122)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4b0c4b339f44bbac0e275eb0718234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fc6cf34323f80b94fe2a9d0867d62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e635ce1fb57024d9bda3b75191c787cb.png)
(3)若点H是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
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【推荐2】如图,在矩形
中,
,点Q是
边的中点,动点P从点B出发,沿着
运动,到达点C后停止运动.已知速度
秒,令
,运动时间为
秒(
).请解答下列问题:
之间的函数表达式,标明自变量的取值范围,并画出函数图象;
(2)当
时,求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc4082d6a235d5c097a7b361506cb84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd23cf0ee5cd9a31bd9923c03e2b159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b7aa3f218cfcfa95d2852e10e618d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679f4c67828f11b44e2b205fa688cd62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052fc4d2a1d08dc58e6264f32a859f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bac0d822010039442d64866f555362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐1】如图,在平面直角坐标系中,直线l交x轴于点A(-1,0)、交y轴于点B(0,3).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/6a40db83-8e5c-4f3a-aacf-2d9d7dd6a3f6.png?resizew=179)
(1)求直线l对应的函数表达式;
(2)在直线l沿x轴正方向平移t个单位长度,得到直线m.若直线m上存在点C,使得△ABC为以AB为斜边的等腰直角三角形,求t的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/6a40db83-8e5c-4f3a-aacf-2d9d7dd6a3f6.png?resizew=179)
(1)求直线l对应的函数表达式;
(2)在直线l沿x轴正方向平移t个单位长度,得到直线m.若直线m上存在点C,使得△ABC为以AB为斜边的等腰直角三角形,求t的值.
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【推荐2】如图,在平面直角坐标系
中,已知
,
,一次函数
的图象与直线
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/95f69b62-3620-42ba-9dd5-779c6e5ac8f6.png?resizew=220)
(1)求
点的坐标;
(2)若
点是
轴上一点,且
的面积等于
,求点
的坐标;
(3)若直线
与
的三边恰好有两个公共点.直接写出
的取值范围 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c84818cfbd9a885081cb4e3294eabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4407788e4dc88210bca71a2551d4f2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/95f69b62-3620-42ba-9dd5-779c6e5ac8f6.png?resizew=220)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b414c1219b65cbb08767f3fa0c7d2ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐1】如图
,在平面角坐标系中,直线
:
与
:
交于点A,分别与x、y轴交于点B、C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/cc4b0b13-4943-44d2-983e-c5112fd49719.png?resizew=383)
(1)分别求出点A、B、C的坐标;
(2)若D是线段OA上的点,且
的面积为
,求直线CD的函数表达式;
(3)在(2)的条件下,设P是射线CD上的点.如图
,过点
作
,且使四边形OCPQ为菱形,请求出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e635cbc81a7e249030dcd076ac477db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d585d2d6643471640905d234d9538c5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/cc4b0b13-4943-44d2-983e-c5112fd49719.png?resizew=383)
(1)分别求出点A、B、C的坐标;
(2)若D是线段OA上的点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
(3)在(2)的条件下,设P是射线CD上的点.如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8630c5cedd146bf30cdc593d8f287d57.png)
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【推荐2】如图1,在平面直角坐标系中,直线
与
轴,
轴分别交于A、B两点,且直线上所有点的坐标
都是二元一次方程
的解;直线
与
轴,
轴分别交于C、D两点,且直线上所有点的坐标
都是二元一次方程
的解,直线a与b交于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/75fad888-a829-492c-906a-bce79d3c4ee0.png?resizew=338)
图1 图2
(1)点A的坐标为 ,点D的坐标为 .
(2)图1中,连接
,求
的面积.
(3)如图2,将线段
平移到
,连接
,点
是线段
(不包括端点
)上一动点,作
直线
,交直线
于
点,连接
.当P点在线段
上滑动时,
是否为定值?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/df96f9f516c37a434eb2730afba1306a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa1eb19ea0412e5e8b65972a98ca59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/df96f9f516c37a434eb2730afba1306a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb131fc7c571f781f4cbbe0787b8e24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/75fad888-a829-492c-906a-bce79d3c4ee0.png?resizew=338)
图1 图2
(1)点A的坐标为 ,点D的坐标为 .
(2)图1中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(3)如图2,将线段
![](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/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5049af0aacd6e6885d43fd814648de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a9023524fc81d19dea5fd0627026b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02618861dc960580de0e43ad50508dce.png)
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【推荐3】【探究∙发现】
正方形的对角线长与它的周长及面积之间存在一定的数量关系.已知正方形
的对角线
长为a,则正方形
的周长为______,面积为______(都用含a的代数式表示).
【拓展·综合】
如图1,若点M、N是某个正方形的两个对角顶点,则称M、N互为“正方形关联点”,这个正方形被称为M、N的“关联正方形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/5b544070-bab5-4cb1-844b-b6fb642fbe60.png?resizew=435)
(1)在平面直角坐标系
中,点P是原点P的“正方形关联点”.若点P在直线
上,则O、P的“关联正方形”面积的最小值为______.
(2)如图2,已知点
,点B在直线l:
上,正方形
是A、B的“关联正方形”,顶点P、Q到直线l的距离分别记为a和b,求
的最小值.
正方形的对角线长与它的周长及面积之间存在一定的数量关系.已知正方形
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
【拓展·综合】
如图1,若点M、N是某个正方形的两个对角顶点,则称M、N互为“正方形关联点”,这个正方形被称为M、N的“关联正方形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/5b544070-bab5-4cb1-844b-b6fb642fbe60.png?resizew=435)
(1)在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
(2)如图2,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e34e19d5cdf6a25652d4614f638f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cdc4824212e952b5a32d89187b8997a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d4ab45e8e8f0084d8d90a4c1233d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
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适中
(0.65)
【推荐1】如图,在平面直角坐标系中,过点C(0,6)的直线AB与直线OA相交于点A(4,2),动点M在直线OA和射线AC上运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/7450e1aa-cba2-443d-b59e-8fed55a19cde.png?resizew=177)
(1)求直线AB的解析式;
(2)求△OAB的面积;
(3)是否存在点M,使△OMC的面积是△OAB的面积的
?若存在,求出此时点M的坐标;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/7450e1aa-cba2-443d-b59e-8fed55a19cde.png?resizew=177)
(1)求直线AB的解析式;
(2)求△OAB的面积;
(3)是否存在点M,使△OMC的面积是△OAB的面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图1,在长方形ABCD中,
;
,点P从A出发,沿
的路线运动,到D停止;点Q从D点出发,沿
路线运动,到A点停止.若P、Q两点同时出发,速度分别为每秒1cm、2cm,a秒时P、Q两点同时改变速度,分别变为每秒2cm、
(P、Q两点速度改变后一直保持此速度,直到停止),如图2是
的面积S(
)和运动间x(秒)的图象.
(1)求出a值;
(2)设点P已行的路程为
(cm),点Q还剩的路为
(cm),请分别求出改变速度后,
、
和运动时间x(秒)的关系式;
(3)求P、Q两点都在BC边上,x为何值时P、Q两点相距3cm?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf2732c063f01d83e8f7cfc2b138732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4853b4705dee3de86e18a346ee3ae853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe7f4205ab9b831ec58a63c125062a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4efa25393fe05011e22ee024d7183b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/14/6fc97df2-cfea-49d2-969f-17aadc9a3169.png?resizew=248)
(1)求出a值;
(2)设点P已行的路程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(3)求P、Q两点都在BC边上,x为何值时P、Q两点相距3cm?
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