如图为一节楼梯的示意图,
米.现要在楼梯上铺一块地毯,楼梯宽度AD为1米,则地毯的面积至少需要( )平方米.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/6489b694-ce4d-4814-8b05-04d09176e20b.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a908a4e1eec10e0af09c6ca3b54fbebf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/6489b694-ce4d-4814-8b05-04d09176e20b.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23高一上·全国·期末 查看更多[1]
更新时间:2023-12-28 11:17:57
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【知识点】 图形的性质
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【推荐1】如图,四边形
是直角梯形,
,
,
,
.若
,
分别在
,
上,
,且
把直角梯形
分成面积相等的两部分,则
( )
![](https://img.xkw.com/dksih/QBM/2023/1/1/3143691738324992/3144385504067584/STEM/8b1bbe8984a749eb84f552fad0e5c836.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5228da61bed106b28849ef91a2ec116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
![](https://img.xkw.com/dksih/QBM/2023/1/1/3143691738324992/3144385504067584/STEM/8b1bbe8984a749eb84f552fad0e5c836.png?resizew=174)
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【推荐2】如图所示,以长方形
的各边为直径向外作半圆,若四个半圆的周长之和为
,面积之和为
,则长方形
的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/a42b5a4f-2ad6-41ba-84b6-f1565f0f5894.png?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705a1b850cb8031e4a90b143bb999d8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41e3aeafc54803ef90a3ec5da4d6c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/a42b5a4f-2ad6-41ba-84b6-f1565f0f5894.png?resizew=152)
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