如图,已知梯形
中,
,
.求梯形的高.
![](https://img.xkw.com/dksih/QBM/2010/8/3/1569805488365568/1569805493559296/STEM/235f8c162d674d96aaffbd2e636eaef8.png)
![](https://img.xkw.com/dksih/QBM/2010/8/3/1569805488365568/1569805493559296/STEM/c9e57ccf34274c879833f0a15e9babb0.png)
![](https://img.xkw.com/dksih/QBM/2010/8/3/1569805488365568/1569805493559296/STEM/4fa5f996613f406db24442d092699937.png)
![](https://img.xkw.com/dksih/QBM/2010/8/3/1569805488365568/1569805493559296/STEM/7106a59e4b804ca0ad4cbed586d0c713.png)
9-10高一下·安徽合肥·期末 查看更多[2]
更新时间:2016-11-30 07:20:21
|
【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
较易
(0.85)
真题
【推荐1】如图,
是圆
的直径,
为圆上位于![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
异侧的两点,连结
并延长至点
,使
,连结
.
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
异侧的两点,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6703a78d8d161ec1b7bcd5dcfe45b22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7679961ea40c8dc24600957d951499a6.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2151388a129f019c64301dfbee190c3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/84bf64f4-3b54-4248-b32b-d8ca2ffe478a.png?resizew=151)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】如图所示,
为
的切线,切点为
,割线
过圆心
,且
.
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573033401475072/1573033407840256/STEM/a129a3a0802140398967f3b5590c5353.png)
(Ⅰ)求证:
;
(Ⅱ)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5c1f5b997325ff92274249b136b6fc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573033401475072/1573033407840256/STEM/a129a3a0802140398967f3b5590c5353.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13a53295a15ca303b296d02ceb24b2fa.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a07fe4bce9ed14540523de48736920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次