如图,在Rt△ABC中,∠ABC=90°,∠BAC的平分线交BC于点O,D为AB上的一点,OD=OC,以O为圆心,OB的长为半径作⊙O.
![](https://img.xkw.com/dksih/QBM/2022/5/18/2982011176542208/2982193486012416/STEM/89d89c53-a1f8-4dfe-ad41-db4f82e4d211.png?resizew=104)
(1)求证:AC是⊙O的切线;
(2)若AB=6,BD=2,求线段AC的长.
![](https://img.xkw.com/dksih/QBM/2022/5/18/2982011176542208/2982193486012416/STEM/89d89c53-a1f8-4dfe-ad41-db4f82e4d211.png?resizew=104)
(1)求证:AC是⊙O的切线;
(2)若AB=6,BD=2,求线段AC的长.
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更新时间:2022-05-18 19:11:05
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【推荐1】如图:在等边三角形ABC的边BC边上取一点D,以CD为边向外作等边三角形CDE,求证:BE=AD.
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【推荐2】如图,在△ABC中,CD是AB边上的中线,E是CD的中点,过点C作AB的平行线交AE的延长线于点F,连接BF.
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【推荐1】如图,在
中,
,
平分
交
于点
,点
在
上,以点
为圆心,
为半径的圆恰好经过点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/3fdd82d2-8f0e-43cc-9386-d3409a7dce96.png?resizew=260)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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(1)求证:
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(2)若
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【推荐2】如图,已知A、B、C、D、E是
上五点,
的直径
,
,A为
的中点,延长BA到点P,使
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(1)求线段BD的长;
(2)求证:直线PE是
的切线;
(3)连接OP,求
的值.
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(1)求线段BD的长;
(2)求证:直线PE是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)连接OP,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a8fe733b02d943732f3cf2662da13e.png)
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