在
中,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3a336a662b5ca544a95ea965169bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.6 | B.10 | C.![]() | D.16 |
22-23九年级上·湖南郴州·期末 查看更多[3]
湖南桂阳县东塔学校2022-2023学年九年级上学期期末学业质量数学监测湖南省郴州市2022-2023学年九年级上学期期末学业质量监测初中数学试卷(已下线)专题09 解直角三角形(四种考法)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(湖南专用)
更新时间:2023-01-09 23:13:45
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【知识点】 解直角三角形的相关计算解读
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【推荐1】如图,在菱形
中,
,
.动点
从点
出发,以每秒2个单位的速度沿折线
运动到点
,同时动点
也从点
出发,以每秒
个单位的速度沿
运动到点
,当一个点停止运动时,另一个点也随之停止.设
的面积为
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秒,则下列图象能大致反映
与
之间函数关系的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/13/3cc5f5a4-c970-40bd-98ff-1180dfa8971f.png?resizew=144)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
【推荐2】如图所示,在△ABC中,AB=AC,动点D在折线段BAC上沿B→A→C方向以每秒1个单位的速度运动,过D垂直于BC的直线交BC边于点E.如果AB=5,BC=8,点D运动的时间为t秒,△BDE的面积为S,则S关于t的函数图象的大致形状是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/b8baeaea-22f8-4010-a088-a9ba23732d36.png?resizew=160)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次