如图,
外接
,点
在直径
的延长线上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3abb60a97ae036441236b5535318ed.png)
![](https://img.xkw.com/dksih/QBM/2020/3/3/2418110883741696/2435414208143360/STEM/4cf7a669-51d6-425b-9903-62b74134d422.png)
(1)求证:
是
的切线;
(2)若
,求
的半径
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3abb60a97ae036441236b5535318ed.png)
![](https://img.xkw.com/dksih/QBM/2020/3/3/2418110883741696/2435414208143360/STEM/4cf7a669-51d6-425b-9903-62b74134d422.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfd5d001e7b9c97e32b5f301752671b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
更新时间:2020-04-06 06:45:48
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图
内接于
,
,
是
的直径,点
是
延长线上一点,且
.
(1)求证:
是
的切线;
(2)若
,求
的直径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/5a42de572d68ded125eccccc512c4fb9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682c9d9b6ad1bc45ddbd6dd01060207b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2020/4/7/2436557430046720/2437842682290176/STEM/5ef0c1e18bd041d0b0d671f1eb4a053a.png?resizew=172)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知AB是⊙P的直径,点C在⊙P上,D为⊙P外一点,且∠ADC=90°,2∠B+∠DAB=180°.
(1)证明:直线CD为⊙P的切线;
(2)若DC=2
,AD=4,求⊙P的半径.
(1)证明:直线CD为⊙P的切线;
(2)若DC=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://img.xkw.com/dksih/QBM/2019/6/14/2225503984082944/2227568867639296/STEM/7762d3ff07cd45f8893756793d16fa9c.png?resizew=138)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四边形ABCD中,AD∥BC,AB=DC,AD=3cm,BC=7cm,∠B=60°,P为BC边上一点(不与B,C重合),连接AP,过P点作PE交DC于E,使得∠APE=∠B.
(1)求证:△ABP∽△PCE;
(2)求AB的长;
(3)在边BC上是否存在一点P,使得DE:EC=5:3?如果存在,求BP的长;如果不存在,请说明理由.
(1)求证:△ABP∽△PCE;
(2)求AB的长;
(3)在边BC上是否存在一点P,使得DE:EC=5:3?如果存在,求BP的长;如果不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/3/2/2151790184546304/2152641541931008/STEM/3c5b9d44e8694aafb17fb2ff0d050660.png?resizew=185)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】如图,AD为
的角平分线,
的延长线于E,
于F,BF、EC的延长线交于点P,求证:CF//AP
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b62ce0cbffa4758c7a0e6fb7ca4d24e.png)
![](https://img.xkw.com/dksih/QBM/2019/10/3/2303860957700096/2304545823047680/STEM/a8e34f3b4035439781eaccc7fc03cea8.png?resizew=161)
您最近一年使用:0次