如图,四边形
中,
平分
.
(1)求证:
;
(2)求证:点
是
的中点;
(3)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71efe9a545fea75620e9e62a430d9e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a429ae3afc4d87d3cd146ac5ea9d281.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28746b9de405ac6fd91273a8f4eef604.png)
(2)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33fdef7490f18ebf7cb98153c885a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/2020/2/1/2389724735635456/2390496507666432/STEM/84cc5ebd6780439ea0433ab251678af4.png?resizew=191)
更新时间:2020-02-02 19:40:30
|
【知识点】 相似三角形的判定与性质综合
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】(1)问题背景:如图1,
,
,
,求证:
;
(2)尝试应用:如图2,将正方形
的边
绕点A逆时针旋转一定角度,得到线段
,连接
交
于点H,连按
,若
,求
的度数.
(3)拓展创新:如图3,四边形
中
,
,
,
,
.求
的长(直接写出答案).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f45ec6cfa31ceea170942fea9e648e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b34233772c4c26d6669499d9b1f15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21fd6087ff96eac9acbd6ee75bb1e46.png)
(2)尝试应用:如图2,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4515e1dff9a852b3294dc1d6488a5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a909c5d9e0c0a063d9a1c4833f42250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec07ca71c03f8c1d6d3a1e2efcdff02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d33dfd5b85a9fb5ba41791cad73377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060705794ef87cc71dac40c57f27b1d2.png)
(3)拓展创新:如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/d3d1c8ef-e71a-4c74-a64d-cd2a6fc289d7.png?resizew=586)
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解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】在平面直角坐标系
中,抛物线
与x轴交于点
,
,与y轴方于点C,点F是抛物线上一动点.
(1)求抛物线的解析式;
(2)当点F在第一象限运动时,作
交BC于H,求线段
最大值;
(3)过点F作
轴交直线
于点D,交x轴于点E,若
,求点F的坐标;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/bb7949ba-1da1-43fc-acad-0b50e31d0e82.png?resizew=393)
(1)求抛物线的解析式;
(2)当点F在第一象限运动时,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66d7b36f3265e396a3fd23fef2493fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3b37020a1975e5133c3971645f2849.png)
(3)过点F作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e7cf15025c0d3c813c21888ba21dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46de8ca9939c6d6fcc5b4cc898032d1.png)
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解答题-问答题
|
较难
(0.4)
【推荐3】如图1,矩形ABCD中,
,
,E为AB上一点,F为AB延长线上一点,且
.点P从A点出发,沿AD方向以4cm/s的速度向D运动,连结PE、PF,PF交BC于点H.设点P运动的时间为
,
的面积为
,当
时,
的面积
关于时间
的函数图象如图2所示.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2972161421492224/2979440183214080/STEM/67f0731c-a9b7-4d6f-a868-27fbb2bc33ab.png?resizew=437)
(1)AE的长是______cm;
(2)当
,是否存在以PH为直径的圆与矩形ABCD的其中一边相切?如果存在,求出t的值;如果不存在,请说明理由.
(3)如图3,将
沿线段BF进行翻折,与CB的延长线交于点M,连结AM,当t为何值时,四边形PAMH为菱形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d291cfc6c4677d20f8674c57322b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3cc7fda3c3631375f975bfd8b4ad1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5f8148759352a4bd48e04403c54528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97c4d747a84924a957a28e12cfa0712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5f8148759352a4bd48e04403c54528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2972161421492224/2979440183214080/STEM/67f0731c-a9b7-4d6f-a868-27fbb2bc33ab.png?resizew=437)
(1)AE的长是______cm;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a4c76357f9b0a762a7d6961fb0367f.png)
(3)如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0240ca878cb089ce3e33a6e67d382ec1.png)
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