如图,在矩形ABCD中,AB=16cm,BC=6cm,点P从点A出发沿AB以3cm/s的速度向点B移动,一直到达点B为止;同时,点Q从点C出发沿CD以2cm/s的速度向点D移动.
![](https://img.xkw.com/dksih/QBM/2014/12/5/1573763729604608/1573763735863296/STEM/ad76fc58ca6f409586192d57aa1f0b54.png)
(1)经过多长时间P、Q两点之间的距离是10cm?
(2)连PD,经过多长时间△PQD是等腰三角形?
![](https://img.xkw.com/dksih/QBM/2014/12/5/1573763729604608/1573763735863296/STEM/ad76fc58ca6f409586192d57aa1f0b54.png)
(1)经过多长时间P、Q两点之间的距离是10cm?
(2)连PD,经过多长时间△PQD是等腰三角形?
更新时间:2016-12-05 21:33:25
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【推荐1】如图,矩形ABCD,AB=16cm,BC=6cm,动点P从点A出发,以3cm/s的速度向点B运动,直到点B为止;动点Q同时从点C出发,以2cm/s的速度向点D运动
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/811795ad-2614-4c07-b9ef-2a773de9b22b.png?resizew=118)
(1)何时点P和点Q之间的距离是10cm?
(2)何时四边形APQD为矩形?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/811795ad-2614-4c07-b9ef-2a773de9b22b.png?resizew=118)
(1)何时点P和点Q之间的距离是10cm?
(2)何时四边形APQD为矩形?
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名校
【推荐2】如图,在
中,
,
,
,点
从
出发沿
向
点以1厘米/秒的速度匀速移动;点
从
出发沿
向
点以2厘米/秒的速度匀速移动.点
、
分别从起点同时出发,移动到某一位置时所需时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/e208146d-07ad-4596-9366-c75a6abf69bf.png?resizew=104)
(1)填空:
_______,
_______.
(2)当
为何值时,
的面积等于
?
(3)当
为何值时,
的面积最大.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/e208146d-07ad-4596-9366-c75a6abf69bf.png?resizew=104)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e7d551cca653e2d638c8cab4c2fda8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3cfb971d78229be0821202a5ce2bb5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcc6c67f4c3c6f79d757a9507e68f65.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
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【推荐1】某数学社团开展实践性研究,测量翠岛湖公园的信号塔
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【推荐2】如图1,
中,
,点P、Q是边
上两个动点,且
,以
为邻边作平行四边形
,
分别交
于点E、F,设
.
(1)当平行四边形
的周长为14时,求m的值;
(2)在第(1)问的条件下,求证:
;
(3)如图2,连接
,当
与
的一边平行时,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/b1b83d09-3e41-4b6b-bb4f-5019f51968a2.png?resizew=575)
(1)当平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf49bdaade8fa40405c292a9d01dcfbd.png)
(2)在第(1)问的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd6c1f0c54f90c0695732b8f67f0aa3.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ebca27d40e27f33b0239f62c1320b3.png)
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