如图,已知正△ABC的边长为6,⊙O是它的内切园,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/2018/9/4/2025272691712000/2026404704739328/STEM/c7e6c2b52a7240a99f4c7ddd97895839.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2018/9/4/2025272691712000/2026404704739328/STEM/c7e6c2b52a7240a99f4c7ddd97895839.png?resizew=107)
A.3![]() | B.2π﹣2![]() | C.3![]() ![]() | D.4![]() |
更新时间:2018-05-07 16:39:41
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【推荐1】在等边
所在平面上有一点
,使得
都是等腰三角形,则满足此条件的点有( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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A.7个 | B.8个 | C.9个 | D.10个 |
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【推荐2】如图,
为等边三角形,
为等腰直角三角形,
,则直线
与直线
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212bfbd5575772ca36d6fc3e7b246e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,
是
的直径,
是
的切线,A为切点,
与
交于点D,连接
.若
,则
的度数为( )
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03c157441734cc2f1853bb3e15b631a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e7b8a59f8d66176463f3d71f882a26.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,
、
分别与
相切于
、
两点,点
为
上一点,连接
、
,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/6ef728b7-b759-4ca1-b00d-11a3f73aba62.png?resizew=127)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20eb987bd0be792b8331f01b0e1b86ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/6ef728b7-b759-4ca1-b00d-11a3f73aba62.png?resizew=127)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在半径为4的
中,将劣弧
沿弦
翻折,折叠后的
恰好与
,
相切,则阴影部分的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/5396eae2-407c-4879-b6b2-597fe5f224e3.png?resizew=119)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在△ABC中,∠BAC=90°,AB=AC=2,以AB为直径的圆交BC于D,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/2018/12/3/2088885584478208/2095455102869505/STEM/6004a6086bdd4710a7bdc69de04d3c37.png?resizew=142)
![](https://img.xkw.com/dksih/QBM/2018/12/3/2088885584478208/2095455102869505/STEM/6004a6086bdd4710a7bdc69de04d3c37.png?resizew=142)
A.1 | B.2 | C.1+![]() | D.2﹣![]() |
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