如图,A、D是
上的两点,BC是直径,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967a1c427bfb4d6aa27c331c84d88ef1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967a1c427bfb4d6aa27c331c84d88ef1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/ab0b2351-5de7-4ed0-90bd-199efbede9f3.png?resizew=139)
更新时间:2022-03-11 11:41:44
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【推荐1】如图,⊙O的弦AB、CD相交于点E,若CE:BE=2:3,则AE:DE=_____ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/8e8e8006-3a96-4000-9456-c7d93bc986a0.png?resizew=115)
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【推荐2】如图,点
在
上,
是
的直径,若
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b63f7bb04b2ddc7c88d0363a812a22f.png)
______________________ 度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4496fe22b40bc63581998e6b7ef6783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/9da49d7bacf74e7d24c001c2061e25fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b63f7bb04b2ddc7c88d0363a812a22f.png)
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【推荐2】如图,是一个圆形人工湖,弦
是湖上的一座桥.已知湖的半径为20米,圆周角
,则
的长为________ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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