如图,
,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/a3767bf3-1f36-49e5-bcb7-3c220d797969.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc959fe86da3d35ef7f83cc0a4e74bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/a3767bf3-1f36-49e5-bcb7-3c220d797969.png?resizew=150)
A.6 | B.4 | C.3 | D.5 |
更新时间:2022-11-20 09:14:13
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【推荐2】如图,已知AD=AE,AF是公共边,用“SAS”证明△ADF和△AEF全等,给出条件正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634752707051520/2638809404956672/STEM/48df6caf-bd91-471e-b80d-f6e8a09ee21c.png?resizew=146)
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A.AF平分∠BAC | B.DF=EF | C.BF=CF | D.∠B=∠C |
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【推荐1】小亮设计了如下测量一池塘两端
的距离的方案:先取一个可直接到达点
,
的点
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,
,延长
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,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】数学活动课上,小组探究学习的任务是测量如图所示的学校后花园里水池的宽度,即
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,
两点之间的距离.数学原理是
和
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