名校
1 . 在
中,已知
,设
以下说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23855fdacb1c062e4fa7fc91bd5f758a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67669a4180f3afa845dce7de5d79f32f.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.当![]() ![]() |
您最近一年使用:0次
2021-07-15更新
|
487次组卷
|
3卷引用:上海市七宝中学2020-2021学年高一下学期期中数学试题
名校
解题方法
2 . 月牙泉,古称沙井,俗名药泉,自汉朝起即为“敦煌八景” 之一,得名“月泉晓澈”,因其形酷似一弯新月而得名,如图所示,月牙泉边缘都是圆弧,两段圆弧可以看成是
的外接圆和以
为直径的圆的一部分,若
,南北距离
的长大约120m,则该月牙泉的面积约为( )(参考数据:
)
![](https://img.xkw.com/dksih/QBM/2021/4/25/2707450096844800/2772066188410880/STEM/4b8ff9a3-7ce6-4cd3-8672-cd21638b6541.png?resizew=113)
![](https://img.xkw.com/dksih/QBM/2021/4/25/2707450096844800/2772066188410880/STEM/e97237a9-bf67-4b0a-91fb-369f63b9694f.png?resizew=359)
![](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/04a0681a8b971b80760a26a66defa6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb74e6547244f8ae3ccbc1fc1133942.png)
![](https://img.xkw.com/dksih/QBM/2021/4/25/2707450096844800/2772066188410880/STEM/4b8ff9a3-7ce6-4cd3-8672-cd21638b6541.png?resizew=113)
![](https://img.xkw.com/dksih/QBM/2021/4/25/2707450096844800/2772066188410880/STEM/e97237a9-bf67-4b0a-91fb-369f63b9694f.png?resizew=359)
A.572 m2 | B.1448 m2 |
C.![]() | D.2704 m2 |
您最近一年使用:0次