在
中,
,D为
的中点,连结
.动点P从点A出发沿折线
以每秒2个单位长度的速度运动,连结
,设点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/2022/9/21/3071354830274560/3072193678417920/STEM/f175cf486e784cd6b102aa8f63c37c97.png?resizew=202)
(1)求线段
的长(用含有t的代数式表示)
(2)在运动过程中,当
时,求t的值.
(3)当P在
上运动时,
,求
的正切值.
(4)当点P不与点C重合时,作点C关于直线
的对称点
,当
时,请直接写出t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2522a6965e901bd75bb53113e0c0dfcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a52ef2a5f53a6d6aed3617b64b3d58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2022/9/21/3071354830274560/3072193678417920/STEM/f175cf486e784cd6b102aa8f63c37c97.png?resizew=202)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(2)在运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd139cfb5f5ff45f03dfa832f53cbfb6.png)
(3)当P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142513b7eef8192f388766125a9c6dda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b8a8bede44a7720564504891f7982e.png)
(4)当点P不与点C重合时,作点C关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d7eca4a35b5741e60723af446a9dc6.png)
更新时间:2022-09-22 22:56:57
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相似题推荐
解答题-问答题
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【推荐1】如图,点P是线段BD上一个动点,∠B=∠D=90°,AB=6,CD=4,BD=a.
(1)当∠APC=90°,a=14时,求BP的长度;
(2)若∠APC=90°时,点P有两个符合要求即P1,P2,且P1P2=2,求a的值;
(3)若∠APC=120°时,点P有且只有一个点符合要求,求a的值.
(1)当∠APC=90°,a=14时,求BP的长度;
(2)若∠APC=90°时,点P有两个符合要求即P1,P2,且P1P2=2,求a的值;
(3)若∠APC=120°时,点P有且只有一个点符合要求,求a的值.
![](https://img.xkw.com/dksih/QBM/2020/5/18/2465148374540288/2466135012229120/STEM/b0fa530141bf4f0b82cb8886d79b1278.png?resizew=195)
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解题方法
【推荐2】如图,Rt△ABC中,∠ACB=90°,AC=6 cm,BC=8 cm,动点P从点B出发,在BA边上以每秒5 cm的速度向点A匀速运动,同时动点Q从点C出发,在CB边上以每秒4 cm的速度向点B匀速运动,运动时间为t秒(0<t<2),连接PQ.
(1)若△BPQ与△ABC相似,求t的值;
(2)连接AQ、CP,若AQ⊥CP,求t的值;
(3)试证明:PQ的中点在△ABC的一条中位线上.
(1)若△BPQ与△ABC相似,求t的值;
(2)连接AQ、CP,若AQ⊥CP,求t的值;
(3)试证明:PQ的中点在△ABC的一条中位线上.
![](https://img.xkw.com/dksih/QBM/2014/6/30/1573734706831360/1573734713171968/STEM/707b869e9b6a4925be8675289840ab20.png?resizew=230)
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【推荐1】抛物线
与x轴交于A,B两点,与y轴交于C点,已知
,抛物线顶点的横坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/f8c324b3-04fb-4f9a-a96b-398b42ab7aad.png?resizew=187)
(1)求抛物线的解析式;
(2)若点D是线段
上的一个动点,过点D作
轴于点E,延长
交抛物线于点F,求线段
的最大值及此时点D的坐标;
(3)在y轴上是否存在一点P,使得
.若存在,求点P的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993769b494e12c21dff0ee7c53a4a49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8b4bbd2f9912adfc9864c0e1e76a9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/f8c324b3-04fb-4f9a-a96b-398b42ab7aad.png?resizew=187)
(1)求抛物线的解析式;
(2)若点D是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(3)在y轴上是否存在一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48098eece9fce567ea0d0b8a8fd7556.png)
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【推荐2】在Rt△ABC中,∠A=90°,
,点D为AB边上-点,
,点P为BC边上一点,连接DP,将DP绕点D逆时针旋转90°得到线段DQ,连接PQ.
(2)当∠BPQ=15°时,求BP的长;
(3)连接BQ,若△BDQ的面积为3,求tan∠BDQ的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c8812220c76ee1374d503c369c0cde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
(2)当∠BPQ=15°时,求BP的长;
(3)连接BQ,若△BDQ的面积为3,求tan∠BDQ的值.
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【推荐1】如图,在平面直角坐标系中,抛物线
,交
轴于点A,交
轴于点
,
,连接
.
(2)点
是直线
下方抛物线上一动点,过点
作
轴交直线
于点
,
是
轴上一点,连接
,使
,求
的最大值及此时
点的坐标;
(3)将原抛物线沿
方向平移
个单位长度,在新抛物线上有一点
,使得
,请写出所有符合条件
的横坐标,并写出其中一种情况的过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.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/82da09bb1fc439ec38bd46cc9d148c6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21556d091b3d5e599bed06e9d7ad0ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19409d6d120387b3bccd934c4911bb45.png)
(2)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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b32f59522eea44b24cdd4c2bc0406e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490943a70a2046e8c4ffc0c01b512019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf9b580a612ba863e6cab13151e7bf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)将原抛物线沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9253f8913f9fd0099d2e89ed8965a703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】在
中,
,点D是边
上一动点,点E是直线
上的点,且
.
,
,且
,求线段
的长;
(2)如图2,若
,
的延长线交
的延长线于点F,求证:
;
(3)如图3,若
,且
,过点C作
交
的延长线于点M,连接
,点N为线段
的中点,连接
,
,当
最小时,直接写出
的面积.
![](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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/928cb42b14030299baee4481b09e8a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df46ad76c129a1eccdea3553e0b7423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/563fc0e0b9ef2136d6d994a9f186adda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635e59c002000da2fa1709b9b979d11a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2267ad3147b9255936767360c36b2295.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c287bb15494297df234f700f9f3a90d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc9f0779b0ba2f9f97caf35c166ad24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108a74d1a3f66ffc2abd9b805657434b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1165830b314a0dab65ea267e82bd3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a3f913906d27cd5ca71e67ab00a6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e1217b02b470ee0d270d3b8d744a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625840effafe71ceadeb11088dca4ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2bd387ad688461e522af5acf2108d5.png)
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【推荐3】【问题提出】
(1)如图1,在矩形
中,
,
,点E为
的中点,点P为矩形
内以
为直径的半圆上一点,则
的最小值为______;
【问题探究】
(2)如图2,在
中,
为
边上的高,且
,P为
内一点,当
时,求
的最小值;
【问题解决】
(3)如图3,滨河学校餐厅门口有一块“疯狂四季”四边形菜园
,
,
与
相交于点P,且
,过点A作直线
的垂线交直线
于点E,即
,
米.赵老师准备在
内种植当季蔬菜,边BE的中点F为菜园出入口,为了种植方便,她打算在
边上取点M,并沿
、
修两条人行走道,要求人行走道的总长度尽可能小,问
的长度是否存在最小值?若存在,求出其最小值;若不存在,请说明理由.
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26ad70d2b3aac8604834d57dfc59bb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
【问题探究】
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf91a833f6977fbefc242f8a8bbeef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f998ca5d4f249d7a703cb5e1339918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d1d99eab930cef884e01b97d4d56f1.png)
【问题解决】
(3)如图3,滨河学校餐厅门口有一块“疯狂四季”四边形菜园
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc2ada75df71c96fa3c6e4845a22726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d5dd999aea55c7cab4641815fa53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05536e7eddf41fa151624ff5244abc56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b6e6c4d71182e71b289e3e65ddcb06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/27/37f20e7d-02a2-411e-91d9-8f9c96654620.png?resizew=463)
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