如图所示,
是
的直径,弦
于点
,
,
,那么
的半径是
![](https://img.xkw.com/dksih/QBM/2017/1/25/1619472216219648/1619472216383488/STEM/bcd15e6d98294583b6cdd0e6f142d64f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b49c2d3750b2d5edf783374a51e481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e9da3d3086fc3673e3b136d4e6fc35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2017/1/25/1619472216219648/1619472216383488/STEM/bcd15e6d98294583b6cdd0e6f142d64f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2017-02-08 11:27:34
|
【知识点】 几何证明选讲
相似题推荐
单选题
|
较易
(0.85)
【推荐1】如图,△ABC中,AC的中垂线交AC、AB于点D、F,BE⊥DF交DF延长线于点E,若∠A=30°,BC=2,AF=BF,则四边形BCDE的面积是
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029584592896/1573029590089728/STEM/7b09e57a30c5463ebf3ed64f5b7fb1df.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029584592896/1573029590089728/STEM/7b09e57a30c5463ebf3ed64f5b7fb1df.png)
A.2![]() | B.2![]() | C.3![]() | D.3![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】如图所示,在矩形ABCD中,AB=
,BC=2,对角线AC、BD相交于点O,过点O作OE垂直AC交AD于点E,则AE的长是
![](https://img.xkw.com/dksih/QBM/2016/10/6/1578976699621376/1578976699850752/STEM/7186ff5432474ac880c7371455a14953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2016/10/6/1578976699621376/1578976699850752/STEM/7186ff5432474ac880c7371455a14953.png)
A.![]() | B.![]() | C.1 | D.![]() |
您最近一年使用:0次