圆锥的母线
,高
,点
是
的中点,
(1)求圆锥的体积;
(2)有一球在该圆锥内部且与它的侧面和底面都相切,求这个球的体积;
(3)一质点自点
出发,沿侧面绕行一周到达点
,求其最短路程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f0f713cd40634ee6c5e075a17064eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(1)求圆锥的体积;
(2)有一球在该圆锥内部且与它的侧面和底面都相切,求这个球的体积;
(3)一质点自点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
23-24高一下·天津·开学考试 查看更多[2]
更新时间:2024-06-06 12:50:40
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【推荐1】已知在直角三角形
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为轴,直角三角形
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(2)一只蚂蚁在问题(1)形成的几何体上从点
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(2)一只蚂蚁在问题(1)形成的几何体上从点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐2】如图所示的圆锥,顶点为O,底面半径是5cm,用一个与底面平行的平面截得一圆台,圆台的上底面半径为2.5cm,这个平面与母线OA交于点B,线段AB的长为10cm.
(2)把一根绳从线段AB的中点M开始沿着侧面绕到点A,求这根绳的最短长度;
(3)在(2)的条件下,这根绳上的点和圆台上底面上的点的距离中,最短的距离是多少?
(2)把一根绳从线段AB的中点M开始沿着侧面绕到点A,求这根绳的最短长度;
(3)在(2)的条件下,这根绳上的点和圆台上底面上的点的距离中,最短的距离是多少?
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解答题-问答题
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【推荐1】如图,在五面体
中,侧面
是正方形,
是等腰直角三角形,点
是正方形
对角线的交点,
且
.
![](https://img.xkw.com/dksih/QBM/2020/3/24/2426234686218240/2426648933654528/STEM/24db67bc2e02417c9ebb2b602728c7e9.png?resizew=100)
(1)证明:
平面
.
(2)若侧面
与底面
垂直,求五面体
的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e89556992cbfd7043330ac7421d342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6020b78ff385667b30088ecadeadd3.png)
![](https://img.xkw.com/dksih/QBM/2020/3/24/2426234686218240/2426648933654528/STEM/24db67bc2e02417c9ebb2b602728c7e9.png?resizew=100)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a78b6fb582468bdd5c3afa5461aefce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)若侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
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解答题-证明题
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适中
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解题方法
【推荐2】如图,已知四边形
是边长为2的菱形,
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平面
.
.
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512803952959488/2513043099443200/STEM/505d9fe4912e4fb8a5ccf5e77c08d354.png?resizew=122)
(1)求证:直线
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbc56d42b003cbcb1fbe5c50e55b26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0db1f4f666a9be9ede868065a50997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a906323ec2c8b8adf2d563467ca6c5.png)
![](https://img.xkw.com/dksih/QBM/2020/7/24/2512803952959488/2513043099443200/STEM/505d9fe4912e4fb8a5ccf5e77c08d354.png?resizew=122)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f09ad78d4eccd1a9c9ccd3c4af79c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d2e338236109f710837757139104b6.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee4a0722e91e3ced3adca5484f634f5.png)
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【推荐1】如图,在空间几何体
中,平面
底面
,
,
,
为
上一点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
平面
.
(1)求
的值;
(2)求几何体
外接球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/3b68484f-de1d-49f6-8169-e100b308d4c2.png?resizew=163)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62034d18f43fa9a659dc78e1e35dc264.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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【推荐2】如图,某种水箱用的“浮球”,是由两个半球和一个圆柱筒组成.已知球的直径是
,圆柱筒长
.
(1)这种“浮球”的体积是多少
(结果精确到
?
(2)要在这样10000个“浮球”表面涂一层胶质,如果每平方米需要涂胶100克,共需胶多少?
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(1)这种“浮球”的体积是多少
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(2)要在这样10000个“浮球”表面涂一层胶质,如果每平方米需要涂胶100克,共需胶多少?
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【推荐1】已知圆锥的顶点为
,母线
所成角的余弦值为
,轴截面等腰三角形
的顶角为
,若
的面积为
.
(2)求圆锥的内切球的表面积;
(3)求该圆锥的内接正四棱柱的侧面面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e609d7f5a3b904e30f43fbbc26033d7.png)
(2)求圆锥的内切球的表面积;
(3)求该圆锥的内接正四棱柱的侧面面积的最大值.
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【推荐2】自半径为
的球面上一点
,引球的三条两两互相垂直的弦
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c110b030d41292121ffd629da34bfdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5559c9a3187c1901e9cc8d2997be58a.png)
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解答题-证明题
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适中
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【推荐3】如图,在正三棱锥
中,
是高
上一点,
,直线
与底面所成角的正切值为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/e1b3bcd4-8d48-4a1f-8af8-21c2829c73fb.png?resizew=140)
(1)求证:
平面
;
(2)求三棱锥
外接球的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cabb973891c409b9b43ff339978f618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/e1b3bcd4-8d48-4a1f-8af8-21c2829c73fb.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f73a0ca4e6c794242489066fddb6c5.png)
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