如图,在给定的一张平行四边形纸片上作一个菱形.小米的作法是:连接
,作
的垂直平分线
分别交
于M,O,N,连接
,则四边形
是菱形.则小米的依据是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2ad60ba1a031bd94dd57fb49628665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b3201de96145a533a239944f69c256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b49da6ed5141fe911ec817d5f538bcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/a5a3787d-d889-4249-9cee-e4c6c41c6a0c.png?resizew=288)
21-22八年级下·全国·单元测试 查看更多[2]
更新时间:2023-05-17 09:14:56
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【推荐1】如图,矩形
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【推荐2】如图,在平行四边形
中,
是
的中点,
是
的中点,
交
于点
若
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_____
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【推荐1】如图,
中,
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,
的面积为
,
于
,
是
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是
上一动点,
周长的最小是等于_____ .
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【推荐2】如图,在△ABC中,∠C=90°,∠B=22.5°,DE垂直平分AB交BC于点E,EC=1,则BE=_____ .
![](https://img.xkw.com/dksih/QBM/2019/2/28/2150300826296320/2151372428673025/STEM/2705b81d2be04fbba385a6fc949bf1e7.png?resizew=202)
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【推荐1】如图,将平行四边形ABCD绕点A顺时针旋转,其中B,C,D分别落在点E,F,G处,且点B,E,D,F在一直线上,BC=2,若点E是BD的中点,则AB的长度为_____ .
![](https://img.xkw.com/dksih/QBM/2020/9/10/2546692043767808/2551489020395520/STEM/b91ab7bd14f842b5abbb78e9cf83dd35.png?resizew=164)
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【推荐2】如图,在▱
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【推荐1】如图平行四边形ABCD中,AC与BD交于点O,BD=2AD,E,F,G分别是OC,OD,AB的中点,下列结论:①FE=GE;②AE=GF;③AE⊥GF;④FE⊥GE;⑤∠ADB=2∠CBE;⑥GF平分∠AGE,其中正确的有_____ .
![](https://img.xkw.com/dksih/QBM/2021/4/20/2703643741626368/2704692973289472/STEM/fabcef75f8de433297fef02a18244c01.png?resizew=191)
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【推荐2】在学平行四边形的时候我们知道把两张等宽的纸条交叉重叠在一起得到的四边形是平行四边形,你能进一步判断重叠部分
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