题型:单选题
难度:0.85
引用次数:2106
题号:5632795
菱形OABC在平面直角坐标系中的位置如图所示,∠AOC=45°,OC=
,则点B的坐标为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/1816fd3d-d061-403e-8142-38f98ba0c64b.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/1816fd3d-d061-403e-8142-38f98ba0c64b.png?resizew=199)
A.( ![]() | B.(1, ![]() | C.( ![]() | D.(1,![]() |
更新时间:2017-10-26 07:06:52
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【推荐1】如图,菱形ABCD中,
,AB=4,则以AC为边长的正方形ACEF的周长为( )
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A.14 | B.15 | C.16 | D.17 |
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【推荐2】如图,菱形
的对角线
相交于点O,且
,
,过点O作
⊥
于点H,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/e6d05f87-a776-483a-97fe-cccf0651ba2e.png?resizew=203)
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A.3 | B.4 | C.![]() | D.![]() |
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【推荐1】如图,
中,
,
,
平分
,
于
,若
,
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的面积是( )
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【推荐2】如图,点
是正六边形
内部一个动点,
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.
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