如图,
是⊙O的直径,弦
,
=30°,
=2
,则S阴影=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7a0a289c-4b25-4172-9c58-af2a82279a0e.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04adb98fb410bb561742348c13f3975e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb710f9fa3670a73b604808753bc1fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7a0a289c-4b25-4172-9c58-af2a82279a0e.png?resizew=161)
A.π | B.2π | C.![]() | D.![]() |
2022九年级·全国·专题练习 查看更多[2]
更新时间:2022-10-15 00:07:17
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【推荐1】如图,
中,
,以
为弦作
,并使直角顶点C在
内,点
在
外,若
,
的半径为7,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/e2ceb6ef-385c-468a-9c22-763236bcda8c.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168cfe6a1c90efe989f6bd4abd1c1100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9671b73087b01512ef5069c66ba2a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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A.![]() | B.![]() | C.![]() | D.12 |
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【推荐2】如图,已知
是
的一条弦,直径
与弦
交于点
,且
,已知
,
,则点
到
的距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/cb67000d-e1f1-4b41-a62a-8bf61d7dc0f0.png?resizew=117)
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dfb01ed6cac58f10345f2b26f6e262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb388a36bd5caaa51b7e3c898e3c906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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A.![]() | B.![]() | C.2 | D.![]() |
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真题
【推荐1】如图,在边长为4的正方形
中,以点
为圆心,
为半径画弧,交对角线
于点
,则图中阴影部分的面积是(结果保留
)( )
![](https://img.xkw.com/dksih/QBM/2019/7/8/2242446195712000/2242643340763136/STEM/4e4e9d1715ae4ce9acb5bae16f283f87.png?resizew=109)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在Rt△ABO中,∠AOB=90°,AO=BO=2,以O为圆心,AO为半径作半圆,以A为圆心,AB为半径作弧BD,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/7/3/2498001761566720/2498678051987456/STEM/66124f892e0b4e4495983cdce7a89e43.png?resizew=163)
![](https://img.xkw.com/dksih/QBM/2020/7/3/2498001761566720/2498678051987456/STEM/66124f892e0b4e4495983cdce7a89e43.png?resizew=163)
A.3π | B.π+1 | C.π | D.2 |
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