如图,有一个绳索拉直的木马秋千,绳索AB的长度为5米,若将它往水平方向向前推进3米(即
米),且绳索保持拉直的状态,则此时木马上升的高度为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/8c4909bf-1e9e-40b2-9bb5-54b15fac57ec.png?resizew=223)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/8c4909bf-1e9e-40b2-9bb5-54b15fac57ec.png?resizew=223)
A.1米 | B.![]() | C.3米 | D.4米 |
更新时间:2022-09-20 05:15:46
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【推荐1】《九章算术》勾股章有一个问题,其意思是:现有一竖立着的木柱,在木柱上端系有绳索,绳索从木柱上端顺木柱下垂后,堆在地面的部分尚有3尺,牵着绳索退行,在离木柱根部8尺处时绳索用尽,请问:绳索有多长?若设绳索长x尺,根据题意,可列方程为( )
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【推荐2】校园内有两棵树,相距12米,一棵树高为13米,另一棵树高8米,一只小鸟从一棵树的顶端飞到另一棵树的顶端,小鸟至少要飞( )
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【推荐1】如图,在Rt
中,
的垂直平分线分别交
,
于点
,
,
交
的延长线于点
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,
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的面积是( )
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