如图,已知,点A、B、C、D在圆上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/b20a29a4-7137-413c-9b71-bda4c6cc1bfa.png?resizew=120)
(1)若EA、ED是
的切线,切点分别是A、D,已知
,求
的周长;
(2)若
,
,
,求BC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/b20a29a4-7137-413c-9b71-bda4c6cc1bfa.png?resizew=120)
(1)若EA、ED是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/765922855c551e266992f66b762a86f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
更新时间:2021-10-18 06:45:25
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【推荐2】如图,在△ABC中,点D是边BC上一点.若AB=5,BD=4,AD=3,BC=10.求AC的长.
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【推荐2】已知
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【推荐2】(1)如图1,
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![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a631226b2177fd5ef032b5767c9b3b5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
求:①
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②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/2b7ecf71-7264-4af5-9949-fa94ca9b6c99.png?resizew=291)
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