如图①是山东舰徽的构图,采用航母
度破浪而出的角度,展现山东舰作为中国首艘国产舰母横空出世的气势,将舰徽中第一条波浪抽象成几何图形,则是一条长为
的弧,若该弧所在的扇形是高为
的圆锥侧面展开图(如图②),则该圆锥的母线长
为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5021dda43ea360fb7b1102c1a462693a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d5d566ff6408458f8dcb2745b50333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/12/6/2608446124498944/2621798340460544/STEM/ae0443dc-64f0-4d46-985c-c5eb524d3929.png)
更新时间:2020-12-25 14:45:17
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相似题推荐
解答题-证明题
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适中
(0.65)
【推荐1】如图,
为等腰直角三角形,
,E是
上一点,D是
延长线上一点,连结
.
![](https://img.xkw.com/dksih/QBM/2022/11/13/3108843081801728/3132005772951552/STEM/4d2489ab5c524162ac26f7567c5386c6.png?resizew=248)
(1)若
.求证:
.
(2)若
,
是等腰三角形,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/11/13/3108843081801728/3132005772951552/STEM/4d2489ab5c524162ac26f7567c5386c6.png?resizew=248)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4018976f3aa7d9364d0772bc7eafda72.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图1,在平面直角坐标系
中,O为坐标原点,直线
与直线
交于点
,与x轴分别交于点
和点C.点D为线段
上一动点,将
沿直线
翻折得到
,线段
交x轴于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/8bfa5460-ccb5-49f8-95c9-7634ba46191a.png?resizew=443)
(1)填空:
___________,
___________,
___________;
(2)求
的面积;
(3)当点E落在y轴上时,求点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486ebc007e97c58980984a84dd397917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fcf3fbb0c91c91725f52432dfa7eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b767a886f234c9a3a41afdb27a5a33ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde32eac58a246c6813f0802ea91987c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/8bfa5460-ccb5-49f8-95c9-7634ba46191a.png?resizew=443)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)当点E落在y轴上时,求点E的坐标.
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在正方形网格图中建立一直角坐标系,一条圆弧经过网格点A、B、C,请在网格图中进行下列操作:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/589f31be-9b22-4ce5-a689-cd7280c989ba.png?resizew=216)
(1)利用网格确定该圆弧所在圆的圆心D点的位置,并写出点D坐标为______;
(2)连接AD、CD,则⊙D的半径为______(结果保留根号),∠ADC的度数为______;
(3)若扇形DAC是一个圆锥的侧面展开图,则该圆锥底面半径为______.(结果保留根号).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/589f31be-9b22-4ce5-a689-cd7280c989ba.png?resizew=216)
(1)利用网格确定该圆弧所在圆的圆心D点的位置,并写出点D坐标为______;
(2)连接AD、CD,则⊙D的半径为______(结果保留根号),∠ADC的度数为______;
(3)若扇形DAC是一个圆锥的侧面展开图,则该圆锥底面半径为______.(结果保留根号).
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解答题-问答题
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适中
(0.65)
【推荐2】如图①,已知圆锥的母线长l=16cm,若以顶点O为中心,将此圆锥按图②放置在平面上逆时针滚动3圈后所形成的扇形的圆心角θ=270°.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/5835055e-dd6a-4e95-b022-cdc1703474bd.png?resizew=344)
(1)求圆锥的底面半径;
(2)求圆锥的表面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/5835055e-dd6a-4e95-b022-cdc1703474bd.png?resizew=344)
(1)求圆锥的底面半径;
(2)求圆锥的表面积.
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