名校
1 . 已知圆锥的母线长为
,其侧面展开图是一个圆心角为
的扇形,则该圆锥的底面面积是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2fdf1944afebb51cb6a5e6c74aadd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-09-30更新
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915次组卷
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5卷引用:湖北省黄冈市2021-2022学年高三上学期9月调研考试数学试题
湖北省黄冈市2021-2022学年高三上学期9月调研考试数学试题湖北省黄石市2021-2022学年高三上学期9月调研考试数学试题江苏省镇江市第一中学2021-2022学年高二上学期10月月考数学试题(已下线)考点16 空间几何体-1-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)4.5.1 几种简单几何体的表面积
解题方法
2 . 如图,在四边形
中,
,
,
,
,
为
上的点且
,若
平面
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/9c8b4694-f3cc-419c-84a7-4589a6f54234.png?resizew=152)
(1)求证:
平面
;
(2)求四棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deeb2b65014a00e15896b45a20d97965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7e555c1ded79dfa64970c86c625b9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/9c8b4694-f3cc-419c-84a7-4589a6f54234.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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2021-03-28更新
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2045次组卷
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4卷引用:湖北省黄冈市麻城二中2020-2021学年高一下学期期中数学试题
湖北省黄冈市麻城二中2020-2021学年高一下学期期中数学试题陕西省宝鸡市2021届高三下学期高考模拟检测(二)文科数学试题(已下线)专题37 仿真模拟卷06-2021年高考数学(文)二轮复习热点题型精选精练山西省晋中市平遥县第二中学校2022-2023学年高一下学期5月月考数学试题
名校
解题方法
3 . 如图,在直三棱柱
中,
,
分别是
的中点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/3ee1969f-c12f-4314-91d5-fb15165a94df.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c40ebd91973b50665276dd1556b715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7afe78487020fe20d0dbd3e7c636f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/3ee1969f-c12f-4314-91d5-fb15165a94df.png?resizew=160)
A.直线![]() ![]() |
B.![]() ![]() |
C.四棱锥![]() ![]() |
D.四棱锥![]() ![]() |
您最近一年使用:0次
2020-12-03更新
|
592次组卷
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2卷引用:湖北省黄冈市麻城二中2020-2021学年高一下学期期中数学试题