如图,在平面直角坐标系中,点A,B的坐标分别是(-3,0),(0,6),动点P从点O出发,沿x轴正方向以每秒1个单位的速度运动,同时动点C从点B出发,沿射线BO方向以每秒2个单位的速度运动.以CP,CO为邻边构造□PCOD,在线段OP延长线上取点E,使PE=AO,设点P运动的时间为
秒.
(1)当点C运动到线段OB的中点时,求
的值及点E的坐标;
(2)当点C在线段OB上时,求证:四边形ADEC为平行四边形;
(3)在线段PE上取点F,使PF=1,过点F作MN⊥PE,截取FM=2,FN=1,且点M,N分别在第一、四象限,在运动过程中,设□PCOD的面积为S.
①当点M,N中,有一点落在四边形ADEC的边上时,求出所有满足条件的
的值;
②若点M,N中恰好只有一个点落在四边形ADEC内部(不包括边界)时,直接写出S的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)当点C运动到线段OB的中点时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当点C在线段OB上时,求证:四边形ADEC为平行四边形;
(3)在线段PE上取点F,使PF=1,过点F作MN⊥PE,截取FM=2,FN=1,且点M,N分别在第一、四象限,在运动过程中,设□PCOD的面积为S.
①当点M,N中,有一点落在四边形ADEC的边上时,求出所有满足条件的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②若点M,N中恰好只有一个点落在四边形ADEC内部(不包括边界)时,直接写出S的取值范围.
![](https://img.xkw.com/dksih/QBM/2014/9/29/1573751662895104/1573751669112832/STEM/553954ead62f4c4a9e5aa89762ceecf4.png)
更新时间:2016-12-05 21:08:52
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【知识点】 相似三角形的判定与性质综合
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解答题-证明题
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较难
(0.4)
【推荐1】在四边形ABCD中,
,∠ABC=90°,AC=AD,DF⊥AC分别交AC,BC于点E,F,
交DE于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/ebc874ad-2dcc-4cda-827b-5fbc9e06bc63.png?resizew=151)
(1)求证:
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(2)求证:
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(3)当F是BC的中点时,求
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(1)求证:
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(2)求证:
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(3)当F是BC的中点时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4465b5971b4a15886bcd69eef74d0700.png)
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解答题-作图题
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较难
(0.4)
【推荐2】(1)已知点P是
内一点,请在图①中用无刻度的直尺和圆规作一条弦
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(2)已知点P是
内一点,请在图②中用无刻度的直尺和圆规作一条弦
,使得
经过点P,且
.(要求:保留作图痕迹,不写作法)
(3)在(2)的条件下,若
且
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(2)已知点P是
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(3)在(2)的条件下,若
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