如图,一个圆锥的轴截面是等边三角形,若该圆锥的侧面展开图的面积是
,则该等边三角形的边长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/be939c0e-b9d4-4400-979d-7642301d39b0.png?resizew=89)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ce31b1731d0965547ddad6dc4d3a2d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/be939c0e-b9d4-4400-979d-7642301d39b0.png?resizew=89)
A.3 | B.![]() | C.![]() | D.2 |
更新时间:2024-03-06 09:28:52
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【推荐1】如图,在正方形
的外侧作等边
,连接
交
于点
,交
于点
,连结
并延长交
于点
,下列结论:①
;②
;③
;④
.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e840dc63ccf302da5965e2774394b9da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7cb5f3fe8762c91405ffe70891afe1c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342a4c46ec41e85ad3c5b6ecdfd00016.png)
A.①②③ | B.①②③④ | C.①③④ | D.①②④ |
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【推荐2】如图,已知双曲线
与正比例函数
交于A、C两点,以
为边作等边三角形
,且
,再以
为斜边作直角三角形
,使
轴,连接
.若
的周长比
的周长多4,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d49d34012ddf68fb981eb4975ac99b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e484d43263f884b7279431de91949c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debbecca0d40d752c42aaf7b78cddeb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f614a3aa0923fbbc1069de0e1d911a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
A.2 | B.4 | C.6 | D.8 |
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【推荐1】一个圆锥形的漏斗,小李用三角板测得其高度的尺寸如图所示,那么漏斗的斜壁AB的长度为
![](https://img.xkw.com/dksih/QBM/2015/6/16/1573848329199616/1573848335351808/STEM/ac7647fc40cd4b668769edbac502de29.png)
![](https://img.xkw.com/dksih/QBM/2015/6/16/1573848329199616/1573848335351808/STEM/ac7647fc40cd4b668769edbac502de29.png)
A.4 cm | B.5 cm | C.5![]() | D.![]() |
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【推荐2】已知圆锥的底面半径为3cm,母线长为6cm,则圆锥的侧面积是( )
A.18cm2 | B.![]() | C.27cm2 | D.![]() |
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