如图,点P在等边
的内部,且
,将线段
绕点C顺时针旋转60°得到
,连接
,则
的值为等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/7a18df12-8e4c-4aa8-8594-1d67fbe778f3.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e5c5f2245f73d55bfe0bc1843ea46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2c39a3d57d2de07a21550fe138ff77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3ee4a2510c4c5091513b3ab2dca6f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51be0cf7e9e0f8c36dee933e7dd80ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/7a18df12-8e4c-4aa8-8594-1d67fbe778f3.png?resizew=182)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2018-02-07 21:53:56
|
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【推荐1】如图,菱形
的对角线
、
相交于点O,过点D作
于点H,若
,则菱形
的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.![]() | B.1 | C.![]() | D.4 |
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【推荐2】已知圆的半径为R,这个圆的内接正六边形的面积为( )
A.![]() | B.![]() | C.6R2 | D.1.5R2 |
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【推荐1】如图,在
中,
,
为边
上一动点,且
于点
,
于点
,则线段
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/62c08126-da43-4733-ab7a-2838caa5605e.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1374c358680d049dfd4ff5fa60c80455.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/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/62c08126-da43-4733-ab7a-2838caa5605e.png?resizew=145)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在△ABC中,∠ACB=45°,BC=1,AC=2
,将△ABC绕点A逆时针旋转得到
,其中点
与点B是对应点,且点C、
、
在同一条直线上,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2021/12/19/2875636653457408/2876102258802688/STEM/09a86bfe-9f7d-42d9-8cf8-ef1c616b1953.png?resizew=206)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://img.xkw.com/dksih/QBM/2021/12/19/2875636653457408/2876102258802688/STEM/09a86bfe-9f7d-42d9-8cf8-ef1c616b1953.png?resizew=206)
A.3 | B.4 | C.2.5 | D.3![]() |
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【推荐2】如图,在△ABC中,∠C=67°,将△ABC绕点A顺时针旋转后,得到△AB′C′,且点C′在BC上,则∠B′C′B的度数为( )
![](https://img.xkw.com/dksih/QBM/2019/1/6/2113053756727296/2114807005552640/STEM/c12b88ff06624c2e84ca5f5b355763ce.png?resizew=103)
![](https://img.xkw.com/dksih/QBM/2019/1/6/2113053756727296/2114807005552640/STEM/c12b88ff06624c2e84ca5f5b355763ce.png?resizew=103)
A.56° | B.50° | C.46° | D.40° |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图1,
为
的直径,点
在线段
的延长线上,
,动点
在
上方的
上运动(含
两点),连接
,设
.有以下结论:
结论Ⅰ:当线段
与
只有一个公共点
时,
的范围是
;
结论Ⅱ:当线段
与
有两个公共点
时,如图2,若
,则
.
下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f5e8943694cd06cffde04d81f4dced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec6ce73c6786d50028addff089bbb64.png)
结论Ⅰ:当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2206e2d017b15fdea0580b241c87fbe.png)
结论Ⅱ:当线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943049ea4622f0ac4844b7c35b9a6434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df41a369a8b0420bb30649f79a43ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e8c7b3bffa3a56177b601657215dc7.png)
下列判断正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/782246fc-7a83-49a1-bef5-e7838287298a.png?resizew=386)
A.Ⅰ和Ⅱ都正确 | B.Ⅰ和Ⅱ都错误 | C.Ⅰ错误Ⅱ正确 | D.Ⅰ正确Ⅱ错误 |
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