名校
解题方法
1 . 球冠是指一个球面被平面所截得的曲面,截得的圆面是底,垂直于圆面的直径被截得的部分是高.如图,已知球的半径为20cm,球冠的高为10cm,现有3根长度相等的支柱
,
,
用于支撑球冠,立于水平的桌面上.若
,为使稳固支撑球冠,则应满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602d0265aa2b89076b0cff90853f7cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7393358bb94b0df78fd4e29223257e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a3bcd3385a9fef291cfe6291d9e10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6838e4c3fcca20d4381e91f1109b07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
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名校
2 . 已知正四棱锥的侧棱长为6,其各顶点都在球
的球面上,那么当该正四棱锥的体积最大时,球
的半径为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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3 . 如图,在梯形
中,
,将
沿直线
翻折至
的位置,
,当三棱锥
的体积最大时,过点
的平面截三棱锥
的外接球所得的截面面积的最小值是_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79380475955a6f7aaf925ac45bc38428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3322a2ad9a95bdc9fc576a7a158d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe9bffd0b4cd1fb8fae50db70dcaffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f836f086a22a72e3fbe809dae934f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ecc884f5b4dc9622e90e1303bc481f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ecc884f5b4dc9622e90e1303bc481f5.png)
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2024·全国·模拟预测
4 . 在直三棱柱
中,已知
,
,
为
的中点,点
在
上,若
平面
,则三棱锥
的外接球的表面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c488b33d3d0bbaa79ceaaab9980d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec21825261a0433b03cc9d962429496a.png)
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5 . 四棱锥
的底面
为正方形,
平面
,且
,
.四棱锥
的各个顶点均在球O的表面上,
,
,则直线l与平面
所成夹角的范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36671a5652834ef8b3984fa76643ce5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8adb2e669e789bb6eb154f7d1defb7bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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2024-05-27更新
|
460次组卷
|
3卷引用:浙江省东阳市2024届高三5月模拟考试数学试题
名校
解题方法
6 . 已知棱长相等的正三棱锥
底面的三个顶点
均在以
为球心的球面上(其中
为
的中心),球面与棱
分别交于点
.若球
的表面积为
,则多面体
的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bb1063e139610045f3bca5ca0b2766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2c4f20594ab1443c0d8dcce42895f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dba908a505cff93e0b297d00b82a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a9ad711b25c36dae0c2a2cedff9954.png)
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7 . 所有顶点都在两个平行平面内的多面体叫作拟柱体.在这两个平行平面内的面叫作拟柱体的底面,其余各面叫作拟柱体的侧面,两底面之间的垂直距离叫作拟柱体的高.现有一拟柱体,上下底面均为正六边形,且下底面边长为
,上底面各顶点在下底面的射影点为下底面各边的中点,高为3,则该拟柱体的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
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2024-05-25更新
|
170次组卷
|
3卷引用:河北省邢台市第一中学2023-2024学年高一下学期5月期中测试数学试题
名校
8 . 已知正方体
的体积为8,且
,则当
取得最小值时,三棱锥
的外接球体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672a0ac4bc62eaf00f64faf4a561fe92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f65d6c33ad1f9b19d90e5fac8ce84fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146ea37856f1603b89c7db7d8e96093d.png)
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2024-05-24更新
|
466次组卷
|
2卷引用:安徽省A10联盟2024届高三4月质量检测考试数学试题
解题方法
9 . 已知矩形
,其中
,点
沿着对角线
进行翻折,形成三棱锥
,如图所示,三棱锥
的外接球的体积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58022e20e4bd2a6c25f3f3a2d14fb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
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名校
解题方法
10 . 已知正三棱台
的所有顶点都在表面积为
的球O的球面上,且
,则正三棱台
的体积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410075edd8565847319636e8f420fc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864734557a72fa455546d4048b713629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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