如图,在
中,
,
,
,点
从点
出发,以每秒
个单位长度的速度沿折线
运动,设点
的运动时间为
秒
.
的长.
(2)斜边
上的高是______.
(3)若点
在
的角平分线上,则
的值为______.
(4)在整个运动过程中,直接写出
是等腰三角形时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83e7c8586eef5596aef5fb5160a196a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77847ba0afc18466b17cea483eb29cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520b756756c7e6236056c3f490dafa5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46e1326cd9fee4b2f67704f51fa4900.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/87fbbe4045c6ef4bd3857d45f33b7cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
(2)斜边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b80f6162fd1dbff226cfcb0f07f5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)在整个运动过程中,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f409b28f7cb97726646e79709ad25190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
22-23八年级上·吉林长春·期末 查看更多[5]
吉林省长春市朝阳区第六十八中学2022-2023学年八年级上学期期末数学试题(已下线)数学(江苏无锡A卷)-学易金卷:2022-2023学年八年级下学期期中考前必刷卷湖南省益阳市赫山区箴龙学校2022-2023学年八年级下学期期中数学试题河南省驻马店市确山县2022-2023学年八年级下学期3月月考数学试题湖南省益阳市沅江市南大膳镇小波学校2023-2024学年八年级下学期期中数学试题
更新时间:2023-01-08 14:08:40
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相似题推荐
解答题-证明题
|
较难
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【推荐1】在四边形
中,对角线
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/1f4fd6a9-92f9-4d39-8650-2ec0166790e4.png?resizew=334)
【感知】如图①,当
时,利用全等知识求证:
.
【探究】如图②,当
时,求
.
【应用】如图③,当
,
,
,
于点
,则
______.
![](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/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/1f4fd6a9-92f9-4d39-8650-2ec0166790e4.png?resizew=334)
【感知】如图①,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009aa13093cc3865dcd51b371892160.png)
【探究】如图②,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be46af71e864e81dac773b9a2dd2a40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c0e79ff076d520b4d7a66ce8db06b3.png)
【应用】如图③,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173904239da66b7bef7cb1d997cc40ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d04e925500528dc7f3680a66072e35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76c404ec77f33e74d30f4d9f829cefb.png)
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【推荐2】如图,△ABD和△ACE中,AB=AD,AC=AE,∠DAB=∠CAE=α,连接DC、BE.
(1)如图1,求证:DC=BE;
(2)如图2,DC,BE交于点F,用含α的式子表示∠AFE;
(3)如图3,过A作AG⊥DC于点G,式于
的值为 .
(1)如图1,求证:DC=BE;
(2)如图2,DC,BE交于点F,用含α的式子表示∠AFE;
(3)如图3,过A作AG⊥DC于点G,式于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bafe42262fa155695ecc715fb25c08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/378526bd-dbb2-469a-8778-cd586c44944d.png?resizew=548)
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【推荐1】如图,在平面直角坐标系
中,
,
,
,其中
,
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/83c0b6f8-8eb2-43ac-a59b-a3a1c92258ad.png?resizew=425)
(1)求点
的坐标;
(2)如图
,若点
在射线
上,且
,求线段
的长度;
(3)如图
,点
为线段
的中点,点
从点
出发,沿
运动到点
停止,连接
并延长交
轴于点
,过点
作
的垂线交射线
于点
,连接
,
,不妨设
,
的面积为
,求
与
的函数关系式,并写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a388a8e291afb1c37d0faee69dee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684e4da7c7ef428edd5804283cc687c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c54f479a1fd12b8847fdbf34fe1487.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/83c0b6f8-8eb2-43ac-a59b-a3a1c92258ad.png?resizew=425)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e0db273061d0331e4e5da9ff1e955e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da6ec0ab50fdadb2f2416da4ed73b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1dd8809233c90f66563c34f2164415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a0a762618aff7410a8e77bc2a4d2ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88479c2f41b376afe2a0a960b689e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】数学兴趣小组的同学在研究三角形面积问题时发现:如果只已知一个三角形两条边的长度,那么当这两条边的夹角为90°时,三角形的面积最大.请你应用相关知识解决以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/763ca410-730d-4887-adbf-be22adecf162.png?resizew=402)
(1)[问题发现]如图1,在△ABC中,AB=3,AC=4,则△ABC面积的最大值为 ;
(2)[问题探究]如图2,在△ABC中,AB=AC,点D在边AB上,AC﹣AD=3,CD=8,点E是BC边的中点,△CDE的面积是否有最大值?如果有,请求出面积的最大值,如果没有,请说明理由;
(3)[问题解决]春意盎然,我市兴庆宫公园迎来了“国花”牡丹盛开的旺季,园林工人准备新开辟一块四边形的牡丹种植园,如图3,在这个四边形ABCD中,需要满足BC=10米,CD=15米,AE=27米,CE=9米.牡丹具有很高的观赏价值和药用价值,若种植牡丹每平方米可获得20元的收益,面积越大其收益也越大,则这块牡丹种植园可以获得的最大收益是多少元?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/763ca410-730d-4887-adbf-be22adecf162.png?resizew=402)
(1)[问题发现]如图1,在△ABC中,AB=3,AC=4,则△ABC面积的最大值为 ;
(2)[问题探究]如图2,在△ABC中,AB=AC,点D在边AB上,AC﹣AD=3,CD=8,点E是BC边的中点,△CDE的面积是否有最大值?如果有,请求出面积的最大值,如果没有,请说明理由;
(3)[问题解决]春意盎然,我市兴庆宫公园迎来了“国花”牡丹盛开的旺季,园林工人准备新开辟一块四边形的牡丹种植园,如图3,在这个四边形ABCD中,需要满足BC=10米,CD=15米,AE=27米,CE=9米.牡丹具有很高的观赏价值和药用价值,若种植牡丹每平方米可获得20元的收益,面积越大其收益也越大,则这块牡丹种植园可以获得的最大收益是多少元?
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真题
【推荐1】如图,在平面直角坐标系中,点M是第一象限内一点,过M的直线分别交x轴,y轴的正半轴于A,B两点,且M是AB的中点.以OM为直径的⊙P分别交x轴,y轴于C,D两点,交直线AB于点E(位于点M右下方),连结DE交OM于点K.
①求A,B两点的坐标;
②求ME的长.
(2)若
,求∠OBA的度数.
(3)设tan∠OBA=x(0<x<1),
,直接写出y关于x的函数解析式.
①求A,B两点的坐标;
②求ME的长.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2568dc29cd94b6f563e4b1ff52b0d044.png)
(3)设tan∠OBA=x(0<x<1),
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173c24c267302cfb2092e66844171ffc.png)
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【推荐2】
阅读理解
在学习中,我们学习了一个定理:直角三角形斜边上的中线等于斜边的一半,即:如图1,在
中,
,若点
是斜边
的中点,则
.
灵活应用
如图2,
中,
,
,
,点
是
的中点,将
沿
翻折得到
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/c8c0e0e4-5fdf-413a-88d7-ce39ea360863.png?resizew=185)
(1)根据题意,则
的长为 .
(2)判断
的形状,并说明理由.
(3)请直接写出
的长 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934abdab2cb16e0adea3442c65587bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58196842483577dbc6be9bc873651d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71622531dfa894f21b2da123d020d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934abdab2cb16e0adea3442c65587bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e908e7b7fa07b74614971966234187b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c505c02c59313fe0108392a5bf5127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe39b7bee12c01b72b5d6c5d5c28e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/058e3cd4-7877-4575-b217-4fd0f95a3d10.png?resizew=184)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/c8c0e0e4-5fdf-413a-88d7-ce39ea360863.png?resizew=185)
(1)根据题意,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0efaac768905d14cb070b4806edf8c.png)
(3)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐1】如图,在
长方形的网格中,每个小正方形边长都为1个单位长度,我们把每个小正方形的顶点称为格点,点A,B,C都为格点,请分别仅用一把无刻度的直尺画图:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/70dfeb70-2dc4-414a-a779-a14b83a10cdc.png?resizew=333)
(1)直接写出
的形状___________;
(2)在图1作出
边上的高
;
(3)P为格点,在图2中作
,且
,若
绕某一点旋转得到
,在图中标出旋转中心O.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490dbe9310ac070780745e3d504a953e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/70dfeb70-2dc4-414a-a779-a14b83a10cdc.png?resizew=333)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)在图1作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(3)P为格点,在图2中作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a6922808e9b59352c25c341cf23851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e659507904de3e4d2648dcb69802f9ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
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【推荐2】已知,如图1,直线
分别交平面直角坐标系中
轴和
轴于
,
两点,点
坐标为
,点
坐标为
,点
在直线
上,且点
坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/f6f0934c-6b2c-4d63-b2dc-f5b023e83547.png?resizew=439)
(1)求直线
的表示式和点
的坐标;
(2)点
是
轴负半轴上的一点,连接
,当
时,求点
坐标;
(3)在第(2)问条件下,若点
为直线
上一点,且
,求点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55784feb4e06799a64be59bad5d8a7d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/f6f0934c-6b2c-4d63-b2dc-f5b023e83547.png?resizew=439)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6686059adf1c994210e781f9ffdc6b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)在第(2)问条件下,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20469e9f33f86277762405593dc620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-问答题
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较难
(0.4)
【推荐3】在平面直角坐标系中,直线
与x轴交于点B,与y轴交于点A,点Q从点A沿线段
运动到点O,速度为1个单位长度/秒,点P从点B沿线段
运动到点A,速度为2个单位长度/秒,两个点同时出发,一个点停止,另一个点也停止,设运动的时间为t秒,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/95a1219a-efa6-4702-9ca7-a04ce62a796d.png?resizew=384)
(1)点A的坐标为______,点B的坐标为______.
(2)应用(1)中结论,当
与
相似时,求t值.
(3)当
为等腰三角形时,请直接写出t值.
(4)点M为线段
上一点,有一动点T沿线段
从点O运动到点M,速度为1个单位长度/秒,再沿线段
由点M运动到点A,速度为
单位长度/秒,请直接写出动点T运动的最短时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a98e24892abc0eb34d5216d4e89c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/95a1219a-efa6-4702-9ca7-a04ce62a796d.png?resizew=384)
(1)点A的坐标为______,点B的坐标为______.
(2)应用(1)中结论,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
(4)点M为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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