如图,在Rt△ABC中,∠C=90°,∠A=60°,AB=12cm.若点P从点B出发以2cm/s的速度向点A运动,点Q从点A出发以1cm/s的速度向点C运动.设P、Q分别从点B、A同时出发,运动时间为ts.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/edc8e786-c202-4054-a209-519b344bb4a4.png?resizew=213)
(1)用含t的式子表示线段AP、AQ的长;
(2)当t为何值时,△APQ是以PQ为底边的等腰三角形?
(3)当t为何值时,△APQ为直角三角形?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/edc8e786-c202-4054-a209-519b344bb4a4.png?resizew=213)
(1)用含t的式子表示线段AP、AQ的长;
(2)当t为何值时,△APQ是以PQ为底边的等腰三角形?
(3)当t为何值时,△APQ为直角三角形?
更新时间:2022-04-15 09:24:16
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】在菱形
中,
,
是直线
上一动点,以
为边向右侧作等边
(A,
,
按逆时针排列),点
的位置随点
的位置变化而变化.
在线段
上,且点
在菱形
内部或边上时,连接
,则
与
的数量关系是________,
与
的位置关系是________;
(2)如图2,当点
在线段
上,且点
在菱形
外部时,(1)中的结论是否还成立?若成立,请予以证明;若不成立,请说明理由;
(3)当点
在直线
上时,其他条件不变,连接
,若
,
,请直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b636880623735373dc89aa54c51e5eb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】将矩形绕着点
按顺时针方向旋转得到矩形
,其中点
与点
,点
与点
分别是对应点,连接
.
(1)如图,若点A,E,D第一次在同一直线上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
①求证:平分
.
②取的中点
,连接
,求证:
.
③若,
,求
的长.
(2)若点A,E,D第二次在同一直线上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f43672e447170a07f44be5c5a08811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知一次函数y=﹣x+7与正比例函数y=
x的图象交于点A,且与x轴交于点B.
![](https://img.xkw.com/dksih/QBM/2020/8/1/2525541366628352/2526094853988352/STEM/769a3506408b41829065c23e72ebfa29.png?resizew=277)
(1)求△AOB的面积.
(2)在y轴上找一点C,使AC+BC最小,求最小值及直线AH解析式.
(3)点P从O出发向B点以1个单位每秒的速度运动,点Q从B点出发向A点以同样的速度运动,两个点同时停止,当△BPQ为等腰三角形时,求Q点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://img.xkw.com/dksih/QBM/2020/8/1/2525541366628352/2526094853988352/STEM/769a3506408b41829065c23e72ebfa29.png?resizew=277)
(1)求△AOB的面积.
(2)在y轴上找一点C,使AC+BC最小,求最小值及直线AH解析式.
(3)点P从O出发向B点以1个单位每秒的速度运动,点Q从B点出发向A点以同样的速度运动,两个点同时停止,当△BPQ为等腰三角形时,求Q点坐标.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知抛物线
的解析式为
,直线
的解析式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63a15357c758fe7722e7d82075ef662.png)
(1)定义:抛物线上的点到直线距离的最小值叫做抛物线到该条直线的距离,取到直线距离最小的抛物线上的点叫做距离点.求证:无论
为何值,抛物线
到直线
的距离都是
;
(2)如图,若抛物线
经过点
和点
与
轴交于点
.过顶点
作
轴,垂足为
,点
是线段
上的一点,若
是以
为底角的等腰三角形,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd7470d910eb10eb2ba5c0c68afd8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63a15357c758fe7722e7d82075ef662.png)
(1)定义:抛物线上的点到直线距离的最小值叫做抛物线到该条直线的距离,取到直线距离最小的抛物线上的点叫做距离点.求证:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5f8b4015e97334de3537a88c26fbdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
(2)如图,若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f221c6eff7ed25794b7fe387bee22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13173e15e465057714d8844af668252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708318545240064/2779691235991552/STEM/2ced1231-c613-474b-a0bf-b22a503981ec.png)
您最近一年使用:0次