如图,在
中,
,
,动点P从点A出发,以每秒
的速度沿
的边逆时针匀速运动;动点Q同时从点A出发,以每秒
的速度沿
的边顺时针匀速运动;设点P的运动时间为t秒
.
上运动时,
______cm(用含t的代数式表示);
(2)当
______秒时,P,Q两点相遇;
(3)是否存在t的值,使得以点A,C,P,Q为顶点的四边形是平行四边形?若存在,请求出t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6850a299395c314b8f8f2f8ca50c9895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db58f1912fc3fb507438cdd6351e5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a11e8c4c6bfbf140ee21f99c0b5e6c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb350074994eccd15cd3126ceabce41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15f9a5145b04ba815452c2d63bd1eec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9985eaef9e31b243d5aaf89b71f66075.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
(3)是否存在t的值,使得以点A,C,P,Q为顶点的四边形是平行四边形?若存在,请求出t的值;若不存在,请说明理由.
更新时间:2024-06-12 20:38:07
|
【知识点】 利用平行四边形的判定与性质求解解读
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解答题-问答题
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【推荐2】如图,
中,
,
,
,
是
中点,
,动点
以每秒1个单位长的速度从点
出发向点
移动,连接
并延长交
于点
,设点
移动时间为
秒.
(1)求
与
间的距离;
(2)
为何值时,四边形
为平行四边形;
(3)当PF=4时,求t的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f39ceeeea3ded221dccda306faf3f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
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![](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/e0629ce42392a7fe9be21d25c39c3e64.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce3dda56837931d8ca674ea84921ad2.png)
(3)当PF=4时,求t的值
![](https://img.xkw.com/dksih/QBM/2020/4/2/2432797551730688/2432836660633602/STEM/ec6f22d18eab443b91404ba0df12ee0b.png?resizew=159)
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