是一个直径为30cm圆形扫地机器人,乙是一个周长为
的莱洛三角形(分别以正
的顶点为圆心,边长为半径画弧得到的封闭图形)扫地机器人,丙是一间长为4m,宽为3m的矩形房间,现单独使用甲或乙对丙进行打扫,则打扫不到的“死角”面积( )
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978531457802240/2988291707445248/STEM/f295534e-c96e-438e-9d06-58bbb0768c28.png?resizew=385)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a10f49ec93fec595da9ed9b9f382681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978531457802240/2988291707445248/STEM/f295534e-c96e-438e-9d06-58bbb0768c28.png?resizew=385)
A.甲较大 | B.乙较大 | C.甲与乙一样大 | D.无法确定 |
2022·浙江金华·二模 查看更多[3]
更新时间:2022-05-27 09:57:57
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,等边三角形
内接于
.若
,则
的半径
的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
A.![]() | B.![]() | C.![]() | D.2![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,
是边长为2的等边三角形,点D、E分别在边
、
上,将
沿直线
折叠,使点B落在点
处,
、
分别交边
于点F、G.则阴影部分图形的周长等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da650ee630c36fd5ce9abb4fb826df7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3a9293c39b2595efa1347c541daa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/9f63cc8b-120a-4005-b494-164a373dc3ad.jpg?resizew=158)
A.4 | B.5 | C.6 | D.7 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】已知方程x2-7x+12=0的两根恰好是一个直角三角形的两条直角边的长,则这个直角三角形的外接圆的直径为()
A.2.5 | B.6 | C.5 | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,矩形纸片
中,
,直
分别为
的中点,
分别为
上的点,将这张纸片沿
折叠,使点B与点G重合,则
的外接圆的面积为( )![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/542d467c-da35-4fa1-8479-5ab53902ab94.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f60be307e8f6a8b4034953a42d60745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28d2790a97390935125aa897417f970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36c50e6833c4f8ded2b3fafee57f641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914a4da61549b972654a013dced360db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbf5459b20ca890a47ebf8d51d90cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/542d467c-da35-4fa1-8479-5ab53902ab94.png?resizew=111)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】对于长度为4的线段AB(图1),小若用尺规进行如下操作(图2)根据作图痕迹,有下列说法:①△ABC是等腰三角形;②△ABC是直角三角形;③△ABC是等边三角形;④弧AD的长度为
,⑤△ABC是直角三角形的依据是直径所对的圆周角为直角,则其中正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f5881bbc1643473cdbdd155178790b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/b6e59b72-bb18-40fb-97e5-949e864f184f.png?resizew=129)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/efd9d4a5-660a-4c60-9c07-ffd4541c082d.png?resizew=129)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,半径为1的⊙O与正六边形ABCDEF相切于点A,D,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2018/9/3/2024536735031296/2027923342114816/STEM/a099bb7ccb5d483a91b923f2a0b3a218.png?resizew=123)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://img.xkw.com/dksih/QBM/2018/9/3/2024536735031296/2027923342114816/STEM/a099bb7ccb5d483a91b923f2a0b3a218.png?resizew=123)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次