如图,在
中,
,点D,E分别是边
的中点,连接
.将
绕点D按顺时针方向旋转
,点A,E的对应点分别为点G,F,
与
交于点P.当直线
与
的一边平行时,
的长为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8746e288cae99059fc94d5f808e5d08b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
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2024·河南郑州·一模 查看更多[4]
2024年河南省郑州市 九年级数学一模模拟试题河南省郑州市金水区第八中学2023-2024学年八年级下学期期中数学试题2024年江苏省宿迁市部分中学中考数学一模试题(已下线)专题6.7 三角形的中位线(分层练习)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
更新时间:2024-05-01 16:53:29
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【推荐1】如图,在四边形
中,
,
,且
,
,点P在
边上,点B关于直线
的对称点为Q,
的延长线交边
于点R,如果
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的长为 ________ .
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【推荐2】如图,
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为边
上的点,且
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【推荐1】如图,在△ABC中,∠ACB=90°,D为AB边的中点,连接CD并延长至点E,使DE=CD.连接AE,过点B作BF∥DE交AE的延长线于点F,若BF=7,则AB的长为_____ .
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【推荐2】如图,AB是⊙O的直径,BC是弦,沿BC对折劣弧BC,交AB于D,点E、F分别是弧AB和弧BD的中点.若AD=4,AB=10,则EF=_____ .
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【推荐1】如图,在直角△ABC中,∠ACB=90°,AC=3,BC=4,且点D,E分别在BC,AB上,连结AD和CE交于点H.若
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【推荐2】(1)如图①,
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两地被池塘隔开,在
中,
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的中点分别为
,E.测量得
米,则
,
之间的距离等于______米;
(2)小星为了解
与
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在
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(2)小星为了解
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【推荐1】如图,矩形
中,
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名校
【推荐2】如图,在
中,已知
,
,点
在边
上,
.把
绕着点
逆时针旋转
度后,如果点
恰好落在初始
的边上,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
__________ .
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