如图,在平面直角坐标系中,正三角形
的一个顶点O在原点,点B的坐标为
,则第二象限的顶点A的坐标是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/19/236ed2f6-2955-46fd-bb72-00dc3fbfad7c.png?resizew=166)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-11-19 15:01:46
|
相似题推荐
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【推荐1】如图:矩形ABCD的对角线AC=8cm,∠AOD=120°,则AD的长为( )
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421250870288384/2421586092269568/STEM/066069c465864f598a39c15c3ae6043d.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421250870288384/2421586092269568/STEM/066069c465864f598a39c15c3ae6043d.png?resizew=132)
A.2![]() | B.2cm | C.4![]() | D.4cm |
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【推荐2】如图,
为等边三角形,AB=8,AD⊥BC ,点E为线段AD上的动点,连接CE,以CE为边作等边△CEF,连接DF,则线段DF的最小值为( )
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595692916973568/2598635282554880/STEM/dc8ab3a9b5314928a148463291d90d48.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595692916973568/2598635282554880/STEM/dc8ab3a9b5314928a148463291d90d48.png?resizew=140)
A.2 | B.4 | C.1.5 | D.![]() |
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【推荐1】如图,在
中,
,
,点
是
边上的动点,过点
作
于
,
于
,则
的长是( )
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410826431488000/2410932842733568/STEM/772a1d29-eb38-46ca-9c13-0873633c9b09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8817091d0f4b7d7ac6df560cb63c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc56fdf70e65bd88980c64af96b83da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f3a30d63fde5623d018b4a77231967.png)
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410826431488000/2410932842733568/STEM/772a1d29-eb38-46ca-9c13-0873633c9b09.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() |
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【推荐2】如图,⊙O的直径AB的长为10,弦AC长为6,∠ACB的平分线交⊙O于D,则AD长为( )
![](https://img.xkw.com/dksih/QBM/2018/1/10/1857261077725184/1862853102526464/STEM/dad18f6d68b845f09c7eb0136473ee68.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/2018/1/10/1857261077725184/1862853102526464/STEM/dad18f6d68b845f09c7eb0136473ee68.png?resizew=141)
A.8 | B.5 | C.![]() | D.![]() |
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