1 . 如图
,在正方形
中,点
为线段
上的动点(不含端点),将
沿
翻折,使得二面角
为直二面角,得到图
所示的四棱锥
,点
为线段
上的动点(不含端点),则在四棱锥
中,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99be23ddbd80e2c75649e3d1f8594130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99be23ddbd80e2c75649e3d1f8594130.png)
A.![]() | B.存在点![]() ![]() ![]() |
C.三棱锥![]() | D.存在点![]() ![]() ![]() |
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名校
解题方法
2 . 如图,在五面体
中,四边形
是边长为
的正方形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612263864760d4ac9fc2feda386ab110.png)
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/2a76fd8c-1855-49e5-9384-4f071ddeb647.png?resizew=200)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612263864760d4ac9fc2feda386ab110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f696d06f763bb7b891475fdea299cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c1acdd27cebb11e0266464b03b3afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/2a76fd8c-1855-49e5-9384-4f071ddeb647.png?resizew=200)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d1a8ed65b138016acff8c465165337.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d83c991c3d5cf60d11454f4ea5a129.png)
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3卷引用:二轮复习联考(一)2021届高三数学文科试题
解题方法
3 . 阳马,中国古代算数中的一种几何体,它是底面为长方形,两个三角面与底面垂直的四棱锥.已知在阳马
中,
平面
,且阳马
的体积为9,则阳马
外接球表面积的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0361ce03135c1407be84d479e64e10e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:陕西省榆林市2021届高三下学期三模理科数学试题
陕西省榆林市2021届高三下学期三模理科数学试题陕西省榆林市2021届高三下学期第三次模拟测试文科数学试题贵州省2021届高三3月份高考数学(理)模拟试题陕西省榆林市2021届高三三模文科数学试题(已下线)重难点08 玩转外接球、内切球、棱切球经典问题-【帮课堂】(苏教版2019必修第二册)
解题方法
4 . 如图①,在等腰三角形
中,
,
,
,
满足
,
.将
沿直线
折起到
的位置,连接
,
,得到如图②所示的四棱锥
,点
满足
.
![](https://img.xkw.com/dksih/QBM/2021/3/30/2688846566506496/2688914521669632/STEM/ea0b3fbe-90b7-45c7-bdaa-239cf87b17e2.png)
(Ⅰ)证明:
平面
;
(Ⅱ)当
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94911ca2a27e4a36c55cdd44a74a9a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cf3bace2a2452486451f1b7327abe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4d8263a27e302a146af84b3812c32e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e7cedc39297d66dbb177f2a1f6bee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85b9860b5da8e4a978da5f4dc356438.png)
![](https://img.xkw.com/dksih/QBM/2021/3/30/2688846566506496/2688914521669632/STEM/ea0b3fbe-90b7-45c7-bdaa-239cf87b17e2.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb88289c2aed70bade0bddea6d1dd72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8511319e215aeba124994a03f2d91fcb.png)
您最近一年使用:0次
5 . 斐波那契螺旋线被誉为自然界最完美的“黄金螺旋”,它的画法是:以斐波那契数:1,1,2,3,5,8,……为边的正方形拼成长方形,然后在每个正方形中画一个圆心角为90°的圆弧,这些圆弧所连起来的弧线就是斐波那契螺旋线.自然界存在很多斐波那契螺旋线的图案,例如向日葵、鹦鹉螺等.下图为该螺旋线的前一部分,如果用接下来的一段圆弧所对应的扇形做圆锥的侧面,则该圆锥的高为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/64c63218-d3c6-430d-99da-bfdf3121cd7c.jpg?resizew=182)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/64c63218-d3c6-430d-99da-bfdf3121cd7c.jpg?resizew=182)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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|
552次组卷
|
3卷引用:四川绵阳南山中学2021届高三高考考适应性考试数学(文)试题
6 . 四面体的棱长为1或2,但该四面体不是正四面体,请写出一个这样四面体的体积___________ ;这样的不同四面体的个数为___________ .
您最近一年使用:0次
名校
解题方法
7 . 已知在四棱锥
中,
平面
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/a4ed3957-4110-471a-b528-87200e1e49dc.png?resizew=160)
(1)求证;
平面
;
(2)若
,试在线段
上确定一点
,使得三棱锥
的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46dfb9c9ab9b7c1f476ec8190114b692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/a4ed3957-4110-471a-b528-87200e1e49dc.png?resizew=160)
(1)求证;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f3abe8876333c19ae7e36c98a9329b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e865ab868791337b2d6751ffdc95df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69dd9f16a5c7a66e62e52fd66f4449ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
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|
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2卷引用:百校大联考2021届高三第六次大联考文科数学试题
8 . 乔家大院是我省著名的旅游景点,在景点的一面墙上,雕刻着如图(1)所示的浮雕,很好地展现了我省灿烂辉煌的“晋商文化”.某陶艺爱好者,模仿着烧制了一个如图(2)的泥板作品,但在烧制的过程中发现,直径为
的作品烧制成功后直径缩小到
.若烧制作品的材质、烧制环境均不变,那么想烧制一个体积为
的正四面体,烧制前的陶坯棱长应为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/19046f7c-4375-4db6-bdee-9bf60ef8b3df.png?resizew=211)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689ff84e2d7f52c7446ef789a54557da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce710269ec0786472cad1bb73ee7d3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d762aad87f41c486312d8ae0bbe31c97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/19046f7c-4375-4db6-bdee-9bf60ef8b3df.png?resizew=211)
A.![]() | B.![]() | C.![]() | D.![]() |
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739次组卷
|
3卷引用:山西省临汾市2021届高三一模数学(理)试题
山西省临汾市2021届高三一模数学(理)试题(已下线)专题10 空间向量与立体几何-备战2021年高考数学(理)经典小题考前必刷集合江西省九江市第三中学2020-2021学年高二下学期期中考试数学(文)试题
9 . 《算数书》是我国现存最早的系统性数学典籍,其中记载有求“困盖”的术:置如其周,令相乘也,又以高乘之,三十六成一,该术相当于给出了由圆锥的底面周长
与高
,计算其体积
的近似公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137abb653a2c06df337b9a502c1818d1.png)
,用该术可求得圆周率
的近似值.现用该术求得
的近似值,并计算得一个底面直径和母线长相等的圆锥的表面积的近似值为9,则该圆锥体积的近似值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137abb653a2c06df337b9a502c1818d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec50b978abc75239e3087d03f9ba6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
A.![]() | B.2![]() | C.3![]() | D.3 |
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3卷引用:广东省2021届高三一模数学试题
解题方法
10 . 已知圆锥的体积为
.其底面半径和母线长的比为
.该圆锥内半径最大的球的表面积为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef43297048597d1a77b729246a56e076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5881f1ce9b4172ca346032d0fd1e3d.png)
您最近一年使用:0次
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4卷引用:内蒙古赤峰市2021届高三一模数学(文)数学
内蒙古赤峰市2021届高三一模数学(文)数学内蒙古赤峰市2021届高三下学期3月模拟考试文科数学试题内蒙古赤峰市2021届高三一模数学(理)试题(已下线)专题10 立体几何-备战2021年高考数学(文)经典小题考前必刷集合