如图,在平面直角坐标系中,O为坐标原点.
的边
在x轴上,A,C,B三点的坐标分别为
,
,
,点P从B出发,以每秒2个单位的速度沿射线
匀速运动,设点P运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/2021/3/31/2689578742882304/2689637929287680/STEM/30a8333187324e5ea406430225fd9a15.png?resizew=390)
(1)求直线
的解析式和
的
边上的高线长;
(2)连接
,写出
的面积S与t的函数表达式;
(3)是否存在一点P,使
是等腰三角形?若存在,请直接写出P点满足条件时,所有t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8c39de4d7d1277da346b51b5bd2499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978afb1da6f1fec85e2b09eeb7ee6403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5694bc08f7a0c0ae7125aed39d00b2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://img.xkw.com/dksih/QBM/2021/3/31/2689578742882304/2689637929287680/STEM/30a8333187324e5ea406430225fd9a15.png?resizew=390)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e534b545e86c02abd2a0dc75d32b407.png)
(3)是否存在一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
19-20八年级下·浙江金华·期中 查看更多[3]
更新时间:2021-03-31 11:05:17
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图1,已知,点
轴,垂足为H,将线段
平移至线段
,点
,其中点A与点B对应,点O与点C对应,a、b满足
.
②直接写出
的面积 .
(2)如图1,若点
在线段
上,证明:
.
(3)如图2,连
,动点P从点B开始在x轴上以每秒2个单位的速度向左运动,同时点Q从点O开始在y轴上以每秒1个单位的速度向下运动.若经过t秒,三角形
与三角形
的面积相等,试求t的值及点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142ac5531e973f24e5fd95d6a7891bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3dd1ffa1d71ff9b4165ab7569a4ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88df74a3bc64aec388b6c23309e469e3.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a3b1804c94eff15005746f8dd7b3c9.png)
(2)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72342d36b9668a02e01104bd7580d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5eb2687a3b0699135afadcb5e34c9ac.png)
(3)如图2,连
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828fcf6ed16b5dae1b572d471f5ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9d87b293ba388258a15146dc032c1f.png)
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解答题-问答题
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(0.65)
【推荐2】如图,一次函数y=kx+b的图象与x轴、y轴分别相交于E,F两点,点E的坐标为(-6,0),OF=3,其中P是直线EF上的一个动点.
(1)求k与b的值;
(2)若△POE的面积为6,求点P的坐标.
(1)求k与b的值;
(2)若△POE的面积为6,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645164820660224/2651015565549568/STEM/ba43dfa2-ccfb-4a4f-a43b-af0c46086b83.png?resizew=197)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,在平面直角坐标系中,
轴于点B,
轴于点D.点
,
,且a,b满足
.
(1)如图1,求证:
;
(2)如图1,若
,在x轴上是否存在点F,使
是以CO为腰的等腰三角形?若存在,求出点F的坐标;若不存在,请说明理由;
(3)如图2,连接AC,BD交于点P,求证:点P为AC中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ea84cba8ccd585ad1da1fd204bc3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2634263d383b0487281fdcf6fe3cc625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94953cf5a25d8337393232c485dcf150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d832f64a2e282b4bd09d957b703c0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783b7700451f22555650af500b2c2e87.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/29c689f3-79d8-492e-b438-2bbe9a2795c2.png?resizew=341)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f543812258a6a92724d3f88810f7402.png)
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941d4f0c967b27482dec4e8dfbb40d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a54de7e539151a11b1aeed986057c6b5.png)
(3)如图2,连接AC,BD交于点P,求证:点P为AC中点.
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解答题-问答题
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适中
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【推荐2】如图,在平面直角坐标系中,
,
,连接
.
![](https://img.xkw.com/dksih/QBM/2022/1/26/2902720468688896/2902975407456256/STEM/664963a9-2cb2-492e-97b8-5670524ca714.png?resizew=290)
(1)画线段
,使得线段
与线段
关于
轴对称,写出
、
的坐标:
,
;
(2)写出一个点
的坐标,使
成为等腰三角形,
,
;
(3)已知点
在坐标轴上,且满足
是等腰三角形,则所有符合条件的
点有 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184fadeb45ed3632d30b231a3fdf0a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302e421a250119f34d8f3c9928730490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2022/1/26/2902720468688896/2902975407456256/STEM/664963a9-2cb2-492e-97b8-5670524ca714.png?resizew=290)
(1)画线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)写出一个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccecddacc80dc992f3be048cb68fd3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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