如图,
是
的外接圆,AD是
的直径,
的半径为
,
,则
的值是( )
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978472191598592/2979046601965568/STEM/f9628bc5-a552-4892-8b11-35e35a75512c.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62eccb33ea66c03222468628f74d8c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
![](https://img.xkw.com/dksih/QBM/2022/5/13/2978472191598592/2979046601965568/STEM/f9628bc5-a552-4892-8b11-35e35a75512c.png?resizew=136)
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更新时间:2022-05-14 08:28:44
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【推荐1】如图,
、
是以线段
为直径的
上的两点,若
,且
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670474385219584/2670486069567488/STEM/23e4d24f-75f9-4d8e-afe1-0ef1bfad7f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/9d365cc7ce9022654091eee60bc1c2b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ab5c45a72849d2cae1d65b282b5bd19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://img.xkw.com/dksih/QBM/2021/3/4/2670474385219584/2670486069567488/STEM/23e4d24f-75f9-4d8e-afe1-0ef1bfad7f69.png)
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【推荐2】下列命题正确的是( )
A.同位角相等 | B.相等的圆心角所对的弧相等 |
C.对角线相等的四边形是矩形 | D.直角三角形斜边上的中线等于斜边的一半 |
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【推荐1】如图,
是
的外接圆,
于
于
交
于
点, 交
于
于
为
的直径, 下列结论: ①
; ②四边形
为平行四边形; ③
; ④
,其中正确的有( )个
![](https://img.xkw.com/dksih/QBM/2022/10/31/3099351768850432/3100143313190912/STEM/9a6f4e4f17b5468fbd4ee8b677ddaea9.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2044937d7debb70e4f8eeba104acd08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6dff5f2e90de6843b101e928aa0f7f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐2】如图,矩形ABCD中,G是BC的中点,过A、D、G三点的圆O与边AB、CD分别交于点E、点F,给出下列说法:(1)AC与BD的交点是圆O的圆心;(2)AF与DE的交点是圆O的圆心;(3)BC与圆O相切,其中正确说法的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/04edfc95-24e7-4577-9d45-cdd24f78b45e.jpg?resizew=140)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/04edfc95-24e7-4577-9d45-cdd24f78b45e.jpg?resizew=140)
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【推荐1】将矩形纸片
,按如图所示的方式向上折叠,当折痕
与
边的夹角为
,
时,图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/43441b2d-6425-41b4-b8e8-2798acf8c234.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】如图,在长方形ABCD中,
,
,点E在AB上,点F在BC上.若
,
,则
( )
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