如图,在
中,
,
,
,
于点D.点P从点D出发,沿线段
向点C运动,点Q从点C出发,沿线段
向点A运动,两点同时出发,速度都为每秒1个单位长度,当点P运动到C时,两点都停止运动,设运动时间为t秒,当t为何值时,
与
相似?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/1615359a-4bc8-48bb-8507-076d8ea8bf81.png?resizew=132)
更新时间:2023-02-20 22:07:14
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,
是四边形
外接圆O的直径,
,延长
到E使得
,作射线
交
的延长线与F,
交
与G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/52a2800d-eb67-4746-b9e2-c9af932d6de2.png?resizew=211)
(1)求证:
与
相切;
(2)若
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fb5d6413689cf29f76ba247d529f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1d267eeb09c171c3e847f0597be31c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/52a2800d-eb67-4746-b9e2-c9af932d6de2.png?resizew=211)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cd2bf7c88e24c91625e0f20ba2a4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d3833ff8c5317cc3ced1570aa19785.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,已知
中,
,
,垂足为点
,
是
边上的中线.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/23b2447e-cecd-4225-9b84-12f1f96d3ac0.png?resizew=206)
(1)若
,求
的度数.
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/28/23b2447e-cecd-4225-9b84-12f1f96d3ac0.png?resizew=206)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd35f055165577f901117038a8cc609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3db3f03c05b28155f9c0d31abfab198.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线l交x轴的负半轴于点A,交y轴的正半轴于点B,且tan∠BAO=
,与双曲线y
(x>0)相交于点P,PC⊥x轴于点C,且PC=2,AB
.
![](https://img.xkw.com/dksih/QBM/2020/12/25/2622012714467328/2679726724972544/STEM/3738959ffe944c6b92c6c44851f755d4.png?resizew=187)
(1)求双曲线的解析式;
(2)若点Q为双曲线上点P右侧的一点,且QH⊥x轴于H,当以点Q、C、H为顶点的三角形与△AOB相似时,求点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2622012714467328/2679726724972544/STEM/3738959ffe944c6b92c6c44851f755d4.png?resizew=187)
(1)求双曲线的解析式;
(2)若点Q为双曲线上点P右侧的一点,且QH⊥x轴于H,当以点Q、C、H为顶点的三角形与△AOB相似时,求点Q的坐标.
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解答题-计算题
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适中
(0.65)
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【推荐2】如图,在某次军事演习中,阴影部分为我军地面以下的战壕,前方有两栋高楼AB、CD,已知AB=10米,CD=62米,敌军在高楼CD中与我军对抗,我军战士在距离点B20米的点P处观测,视线PA经过点A落到CD上的点E处,ED=30米,点P、B、D在一条直线上.该战士向点B的方向行走12米到点Q处观测,请问他此时能否看到高楼CD的最高点C?请通过计算说明理由.
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962075516395520/2962861670268928/STEM/231263b0-cd1f-449b-805f-0c67f84f1315.png?resizew=249)
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