在菱形ABCD中,M是AD的中点,AB=4,N是对角线AC上一动点,△DMN 的周长最小是2+
,则BD的长为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/beb26904-cc8b-4be8-a032-12a452d29d56.png?resizew=137)
更新时间:2020-03-14 12:51:51
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【推荐1】在
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【推荐2】如图,在
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【推荐3】某校航天社团模拟火星探测器的发射过程,如图,地球,火星的运行轨道抽象成以太阳O为圆心的圆,探测器从地球到火星的转移轨道则抽象成以
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【推荐1】如图,
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【推荐2】如图,在四边形
中,C是
的中点,
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【推荐1】如图,在
中,
是
边中点,
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【推荐1】如图,在菱形ABCD中,对角线AC、BD相交于点O,AC=6,BD=8,点P是AC延长线上的一个动点,过点P作PE⊥AD,垂足为E,作DC延长线的垂线,垂足为F,则|PE-PF|=_____ .
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【推荐2】如图,以菱形ABCD各边的中点为顶点作四边形A1B1C1D1,再以A1B1C1D1各边的中点为顶点作四边形
,……,如此下去,得到四边形
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的周长___ .
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