如图,在
中,
,
,垂足分别为D,E,
与
相交于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/efa196f9-68b9-47d6-ac4e-54d2d3dc280f.png?resizew=151)
(1)求证:
.
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/efa196f9-68b9-47d6-ac4e-54d2d3dc280f.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3354385d3993b2d3986f87796abc1d8.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267afa4e3930f590081bf1cc4c3be327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
更新时间:2024-03-08 14:44:43
|
【知识点】 相似三角形的判定与性质综合
相似题推荐
解答题-作图题
|
较易
(0.85)
【推荐1】如图,在
中,
,
,请用尺规作图法,在
上求作一点
,使得
.(保留作图痕迹,不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d777d15cd733338ecfd0ea63819f62c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486183a88001626ef319e9faeec421a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda767cecfc33d68fb7e6cd0e1e568b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/134ccd1e-64a0-4c83-bcfd-5bd3b1c585f1.png?resizew=182)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
【推荐2】如图,
为
内一点,过点
作
,
的平行线分别交
于点
,
,连接
并延长交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/53e1f3dc-1c8c-4f93-b15f-940b8768e92a.png?resizew=230)
(1)求证:
.
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb6fd2fa53b92a03d21f208b74e3857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/53e1f3dc-1c8c-4f93-b15f-940b8768e92a.png?resizew=230)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2264da24223fe6459bf20f6f1697dde.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fca3734de79f7f50b552ef62b29dc7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731016f5081dca7e5726598d757c0449.png)
您最近一年使用:0次