如图,已知
,
于
,
是
的中点,
的延长线交
的延长线于点
.求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5157ececc262282b082f777c86e2b2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e131dd2c5824d4ea6be2491f88f5bb0d.png)
更新时间:2018-04-10 12:55:45
|
【知识点】 相似三角形的判定与性质综合
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】在△ABC中,AB=AC=5,BC=6,D,E分别是边AB,AC上的两个动点(D不与A,B重合),且保持DE∥BC,以DE为边,在点A的异侧作正方形DEFG.
![](https://img.xkw.com/dksih/QBM/2019/10/18/2314182977519616/2317725678084096/STEM/903f6d913efb458994fc7f83b76f3eab.png?resizew=199)
(1)当FG与BC重合时,求正方形DEFG的边长;
(2)设AD=x,△ABC与正方形DEFG重叠部分的面积为y,试求y关于x的函数关系式,并写出x的取值范围;
(3)当△BDG是等腰三角形时,请直接写出AD的长.
![](https://img.xkw.com/dksih/QBM/2019/10/18/2314182977519616/2317725678084096/STEM/903f6d913efb458994fc7f83b76f3eab.png?resizew=199)
(1)当FG与BC重合时,求正方形DEFG的边长;
(2)设AD=x,△ABC与正方形DEFG重叠部分的面积为y,试求y关于x的函数关系式,并写出x的取值范围;
(3)当△BDG是等腰三角形时,请直接写出AD的长.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在
中,
于点
,点
为线段
上任一点(点
除外),连接
,将线段
绕点
顺时针方向旋转
角,且
,得到
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/be55cfcb-5e25-46e1-b6c1-a444055f75ba.png?resizew=448)
(1)如图1,当
,且
时,求证:
,
;
(2)如图2,当
,且
时,(1)中的结论是否成立?若成立,请予以证明;若不成立,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d96ea1d2ccff6846476a356352e4460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/be55cfcb-5e25-46e1-b6c1-a444055f75ba.png?resizew=448)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b539ad330f39b9ea2e9ebb3c99a2489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b819901d1101c648774ca6dc295781.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
您最近一年使用:0次