如图,
是两个同心圆中大圆的弦,且
与小圆相切于点C,若两圆半径分别为
和
,则弦
长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/f63392cd-d9cb-4e0f-b628-9eb803f5e40e.png?resizew=128)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd6f4250ca6b1b9bce234a01f00d44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/6/f63392cd-d9cb-4e0f-b628-9eb803f5e40e.png?resizew=128)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-02-05 14:26:58
|
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【推荐1】如图,在
中,
为
边上的一个动点,
,
,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/3a9889d1-ec6a-4381-b836-431551d1b89b.png?resizew=217)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/3a9889d1-ec6a-4381-b836-431551d1b89b.png?resizew=217)
A.10 | B.8 | C.![]() | D.![]() |
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【推荐2】如图,数轴上点A、B、C分别对应
、
、
,过点
作
,以点
为圆心,
长为半径画弧,交
于点
,以点A为圆心,
长为半径画弧,交数轴于点
,则点
对应的数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,是
的直径,C是
上一点,
,连接
,以点O为圆心,大于O到
的距离为半径作弧,交
于E,F两点,分别以点E,F为圆心,大于
的长为半径在
右上方作弧,两弧相交于点M,作射线
交
于点D,则
的长为( )
A.1 | B.1.5 | C.2 | D.2.5 |
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【推荐2】如图,已知AB是⊙O的直径,CD是OO的弦,AB⟂CD.垂足为E.若AB=26,CD=24,则∠OCE的余弦值为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,
是
的直径,
切
于点
,线段
交
于点
,连接
.若
,则
等于( )
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804607210479616/2805317730500608/STEM/214fb46f-e182-4bfa-8fbe-2c988528495e.png)
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【推荐2】如图,
内接于圆,
,过点
的切线交
的延长线于点
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( )
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