在菱形ABCD中,对角线AC、BD相交于点O,AC=8,BD=6,则菱形ABCD的周长是( )
![](https://img.xkw.com/dksih/QBM/2019/8/4/2261497162153984/2285915569913856/STEM/b62b10241fdf41d184fb22ea5d2dbe0a.png?resizew=197)
![](https://img.xkw.com/dksih/QBM/2019/8/4/2261497162153984/2285915569913856/STEM/b62b10241fdf41d184fb22ea5d2dbe0a.png?resizew=197)
A.20 | B.40 | C.24 | D.48 |
更新时间:2019-09-12 05:52:32
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【知识点】 利用菱形的性质求线段长解读
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【推荐1】根据四边形的不稳定性,当变动∠B的度数时,菱形ABCD的形状会发生改变,当∠B=60°时,如图1,AC=
;当∠B=90°时,如图2,AC=( )
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829232694124544/2830007830020096/STEM/7348945a-50be-4d3e-be74-4943ed18e2c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829232694124544/2830007830020096/STEM/7348945a-50be-4d3e-be74-4943ed18e2c0.png)
A.![]() | B.2 | C.2![]() | D.![]() |
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【推荐2】如图,在菱形
中,E、F分别是
的中点,若
,则菱形
的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.12 | B.16 | C.20 | D.24 |
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