名校
解题方法
1 . 如图,在三棱柱
中,侧面
底面
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/6/2478906222723072/2480255212806144/STEM/d1f3e58b9df1463b8be920086fd8e762.png?resizew=278)
(1)求证:
平面
;
(2)设
中点为
点,若
,
,且
与平面
所成的角为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce04b35c265cc9c48b60204bd2f718ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://img.xkw.com/dksih/QBM/2020/6/6/2478906222723072/2480255212806144/STEM/d1f3e58b9df1463b8be920086fd8e762.png?resizew=278)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783fc17e7381a5006945061a0782a063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f257834c91b6f7095035f26561005f.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,已知三棱柱
的所有棱长均为2,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/c46f45be-4d14-4f3b-8488-162377df0589.png?resizew=227)
(Ⅰ)证明:
平面
;
(Ⅱ)若平面
平面
,
为
的中点,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abbb4afeaca62289bbd780e672d29868.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/c46f45be-4d14-4f3b-8488-162377df0589.png?resizew=227)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
(Ⅱ)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/86cdb207ee6ced908b8ca8082477c26e.png)
您最近一年使用:0次
2020-05-26更新
|
459次组卷
|
3卷引用:2020届四川省攀枝花市高三第三次统一考试数学(文)试题
3 . 如图,在直三棱柱
中,平面
面
,
交
于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/88594a3c-1e1c-41e4-803f-57a9a5c98202.png?resizew=192)
(Ⅰ)求证:
;
(Ⅱ)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/88594a3c-1e1c-41e4-803f-57a9a5c98202.png?resizew=192)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73152c2b4298298c8b81dc16dc21f5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68d3529c97d99daca0b3d59be9488d4.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,
底面
,
为直角,
,
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/de4da3d6-a235-4225-bca2-a24644adfe4e.png?resizew=200)
(I)证明:平面
平面
;
(II)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827d77011af6d7cbfca37ed0f8229526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5408641691fd27f6dd8cf0ab2043ad4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54ba1177906d8fca3dc0ec3d9116624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/de4da3d6-a235-4225-bca2-a24644adfe4e.png?resizew=200)
(I)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f80957db80aa2411988a6ed6a4d9d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1910c648c8bfa02218b2802f5bfbacfa.png)
(II)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958a1ccefcd15a40892b35c9f0ca88d8.png)
您最近一年使用:0次
2019-03-31更新
|
1961次组卷
|
2卷引用:【市级联考】四川省攀枝花市2019届高三第二次统一考试数学(文)试题
解题方法
5 . 如图,矩形
和菱形
所在的平面相互垂直,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/d76b6ba9-6a29-4ad7-b24c-e3b132bbf619.png?resizew=169)
(1)求证:
平面
;
(2)若
,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2573d44bd027ab2e2fc2472c7852af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/d76b6ba9-6a29-4ad7-b24c-e3b132bbf619.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071159cac13097ea0928285bc1be66d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2115dafa5b4cf6a2e477e47301f58121.png)
您最近一年使用:0次
2018-11-19更新
|
1074次组卷
|
3卷引用:【市级联考】四川省攀枝花市2019届高三第一次统一考试文科数学试题
解题方法
6 . 如下图,四棱锥
中,
⊥底面
,
,
为线段
上一点,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/d110a154-c5ec-4b00-acb3-7ef665397962.png?resizew=205)
(1)证明:
平面
;
(2)求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4426db778693c875e2dca9220875d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75fe92f2f92bf7cc7a32576e5d8ac07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23db69ae2e259276878d63a9df8d3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/25/d110a154-c5ec-4b00-acb3-7ef665397962.png?resizew=205)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51bd3cfe7b4b95f6015d1c8480de1c70.png)
您最近一年使用:0次
2018-04-26更新
|
641次组卷
|
2卷引用:四川省攀枝花市2018届高三第三次(4月)统一考试数学文试题
7 . 如图,四棱锥
中,侧面
底面
.
.
(1)求证:
平面
;
(2)若三棱锥
的体积为2,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0555e356dd29a3ec02b0346d845df0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d9efde55af9f8a36a964dd1f2496f2.png)
![](https://img.xkw.com/dksih/QBM/2018/10/22/2058936736178176/2064809361244160/STEM/3d2d4adc0e6a4c23854993a49c605069.png?resizew=280)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10c16d2d9d22c4b34ddd965e26aa0d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
您最近一年使用:0次
2018-01-21更新
|
667次组卷
|
7卷引用:四川省攀枝花市第十二中学2019届高三10月月考数学(文)试题
四川省攀枝花市第十二中学2019届高三10月月考数学(文)试题福建省厦门市2018届高三年级第一学期期末质检文科数学试题(已下线)2018年高考二轮复习测试专项【新课标文科】热点八 几何体的表面积与体积的求解河南省豫南九校2018届高三下学期第一次联考试题文科数学河南省豫南九校2018届高三下学期第一次联考文数试题河南省商丘名校2018-2019学年高一上学期期末联考数学试题(已下线)河南省豫南九校2020-2021学年高一下学期第一次联考数学试题
2011·广东惠州·三模
8 . 已知梯形ABCD中,
,
,AB=BC=2AD=4,E、F分别是AB、CD上的点,且
,设
,G是BC的中点,沿EF将梯形
翻折,使平面
平面EBCF(如图).
![](https://img.xkw.com/dksih/QBM/2011/3/19/1570047791587328/1570047796838400/STEM/fe1cff1f0b6d4af8878ea8a9c48526fa.png?resizew=376)
(1)当
时,求证:
;
(2)若以F、B、C、D为顶点的三棱锥的体积记为
,求
的最大值;
(3)当
取得最大值时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132078d5f2e4e80b10879952cecc3465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d3947804a878a87052c266be475423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d7633c86f5b27a0db50eef3e8478a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77d8c77f758b4a06c320be39ecb328f3.png)
![](https://img.xkw.com/dksih/QBM/2011/3/19/1570047791587328/1570047796838400/STEM/fe1cff1f0b6d4af8878ea8a9c48526fa.png?resizew=376)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcadd3ed6d1b8102d6260091e0bbdb.png)
(2)若以F、B、C、D为顶点的三棱锥的体积记为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febe72169c8dd4ecb57eadf7256dcbeb.png)
您最近一年使用:0次