已知
,
则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61e60c71c305d45fd2856cea4e41d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db869ee52e295e5d93d008a52d2befb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d836bfb2069893525f3d677677c5cac.png)
A.6 | B.5 | C.4 | D.3 |
18-19九年级·浙江杭州· 查看更多[2]
更新时间:2020-06-05 17:15:07
|
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名校
【推荐1】在
中,
,
,
,
的对边分别是a,b,c,若
,
,则
的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8aca16ad7b2e7c21bb5555a12578831.png)
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【推荐2】将一张正方形纸片按如图的步骤,通过折叠得到④,再沿虚线剪去一个角,展开平铺后得到⑤,其中FM、GN为折痕,若正方形EFGH与五边形MCNGF的面积之比为4:7,则
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/16/e47062d7-0765-4b6f-8468-59b8ed104a87.png?resizew=517)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
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