名校
解题方法
1 . 如图1所示,在边长为3的正方形ABCD中,将△ADC沿AC折到△APC的位置,使得平面
平面ABC,得到图2所示的三棱锥
.点E,F,G分别在PA,PB,PC上,且
,
,
.记平面EFG与平面ABC的交线为l.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/6c137775-a663-4601-94f9-c773c9f1b07a.png?resizew=408)
(1)在图2中画出交线l,保留作图痕迹,并写出画法.
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1095b030f441de5fb223781b00f3dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715ef932b72eb703f3e7a17ee2ce6a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1828795d52174dd64fba1c9ebe61072b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cf0ee918f8c2f753302d3b5928d358.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/6c137775-a663-4601-94f9-c773c9f1b07a.png?resizew=408)
(1)在图2中画出交线l,保留作图痕迹,并写出画法.
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
您最近一年使用:0次
名校
解题方法
2 . 如图2,在三棱锥
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/5dd48efa-5b79-4140-8c12-47f705a4e399.png?resizew=168)
(1)证明:
平面
;
(2)若点
在
上且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667a56d1d0bc458aae2cd82a04c7bc85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/5dd48efa-5b79-4140-8c12-47f705a4e399.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a503821ae8f060de6a97541993e7450a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2023-04-23更新
|
715次组卷
|
2卷引用:贵州省贵阳市五校2023届高三联合考试(五)数学(文)试题
名校
解题方法
3 . 如图,已知正方体
的棱长为
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/30d683c7-ae25-4ec8-ae32-4d4b07512790.png?resizew=180)
(1)已知点
满足
,求证
四点共面;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b684d2e78a0eb1b406913f2730e1d226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69ed30e30ec2020f0778986a40902ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/30d683c7-ae25-4ec8-ae32-4d4b07512790.png?resizew=180)
(1)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ff7efc4eabec461ef4ffa6b414992e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22c2178bc89a9d1bc829f9cd5656d6a.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2023-04-22更新
|
1616次组卷
|
7卷引用:贵州省六校联盟2023届高三实用性联考(四)数学(文)试题
4 . 如图,在正三棱柱
中,
,
分别为棱
,
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/fe37e8ca-bdb0-4efa-85dd-3898d4154daa.png?resizew=145)
(1)证明:
平面
;
(2)若三棱锥
的体积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/fe37e8ca-bdb0-4efa-85dd-3898d4154daa.png?resizew=145)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7cd40c9d26ada55e07fa71a4b98be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf462eaaad82d6bc3b460385fd9f0de.png)
您最近一年使用:0次
2023-04-20更新
|
649次组卷
|
2卷引用:贵州省遵义市第十八中学2022-2023学年高二下学期第一次月考数学试题
5 . 如图所示,在四棱锥
中,侧面
侧面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2023/3/28/3204443689017344/3205615012315136/STEM/85ff8f44c2994e0db9e634cff55924dc.png?resizew=184)
(1)求证:平面
平面
;
(2)若点A关于
中点的对称点为
,三棱锥
的体积为
,求点A到
的距离.
![](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/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b336e518ac4ff04c6c26e4b8a15844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64b90bb4f0aff43e325f5429954876b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83c3f76bc7569c3c088da98bb3b2c50.png)
![](https://img.xkw.com/dksih/QBM/2023/3/28/3204443689017344/3205615012315136/STEM/85ff8f44c2994e0db9e634cff55924dc.png?resizew=184)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若点A关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41402e9b73d1dd0dbc93fcd8c3c60fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
您最近一年使用:0次
6 . 正方体
中,AC与BD交于点O,点E,F分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/95472ad1-e8d7-4568-bb71-dcd9604aae07.png?resizew=194)
(1)求证:平面
平面BEO;
(2)若正方体的棱长为2,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e86e3991200297ad172455e5ea93f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/95472ad1-e8d7-4568-bb71-dcd9604aae07.png?resizew=194)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9bbbb23bd5e1cbe61408bd632350f3.png)
(2)若正方体的棱长为2,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80318b27b799587e8771a6b6270dbd1.png)
您最近一年使用:0次
2023-03-21更新
|
532次组卷
|
4卷引用:贵州省毕节市2023届高三诊断性考试(二)数学(文)试题
贵州省毕节市2023届高三诊断性考试(二)数学(文)试题(已下线)专题13 押全国卷(文科)第18题 立体几何(已下线)专题13立体几何(解答题)宁夏回族自治区石嘴山市第三中学2023届高三第四次模拟考试数学(文)试题
解题方法
7 . 如图1,在
中,
,
,
为
的中点,
为
上一点,且
.现将
沿
翻折到
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/56b07a27-0183-46df-a3d7-1cff87c6bd18.png?resizew=392)
(1)证明:
.
(2)已知
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9680bd6f250acb8b568510419b59d3e7.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9272e76d70b87882b81823e5de53bc14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/56b07a27-0183-46df-a3d7-1cff87c6bd18.png?resizew=392)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8c5e0036173420e073f26c8f643ae3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ee386d4744d2fbdb91a94da4027983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba844d4d35a531a0abe98fbd33a4582.png)
您最近一年使用:0次
2023-03-14更新
|
698次组卷
|
6卷引用:贵州省黔东南州2023届高三第一次适应性考试数学(文)试题
贵州省黔东南州2023届高三第一次适应性考试数学(文)试题陕西省咸阳市高新一中2023届高三下学期第八次质量检测文科数学试题河南省焦作市2022-2023学年高三第二次模拟考试数学(文科)试题(已下线)专题13立体几何(解答题)(已下线)专题11 空间图形的表面积与体积-期中期末考点大串讲(苏教版2019必修第二册)(已下线)期末复习07 空间几何线面、面面垂直-期末专项复习
解题方法
8 . 如图甲,已知四边形ABCD是直角梯形,E,F分别为线段AD,BC上的点,且满足
,
,
,
.将四边形CDEF沿EF翻折,使得C,D分别到
,
的位置,并且
,如图乙.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/16a650ec-f3f9-4ca4-8bd3-5b507bcef11c.png?resizew=365)
(1)求证:
;
(2)求点E到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d40e403b138555d6a6fe99b26ee7eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dda460b3099274f7ec63376b035c16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb79e86ac3a8a4f97e760e2dec04ad8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/16a650ec-f3f9-4ca4-8bd3-5b507bcef11c.png?resizew=365)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21460a8145ad1b2c22eb6d42d706a43e.png)
(2)求点E到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
您最近一年使用:0次
2023-03-14更新
|
397次组卷
|
3卷引用:贵州省六校联盟2023届高三下学期适应性考试(三)数学(文)试题
9 . 如图,在三棱锥
是,
,且
,O为
的中点,若
是边长为1的等边三角形,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/af2f5194-28d4-4ed4-8eff-20d477d8f605.png?resizew=183)
(1)证明:平面
平面
;
(2)求点O到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71807a35b3170fce28ee6edf4c00d083.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/af2f5194-28d4-4ed4-8eff-20d477d8f605.png?resizew=183)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求点O到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
10 . 如图,已知平行六面体
的底面
是菱形,
,
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/0ae83c6c-1abc-4d73-a221-c4cce03141e4.png?resizew=168)
(1)试在平面
内过点
作直线
,使得直线
平面
,说明作图方法,并证明:直线
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7140fdf18ef6197cc694c6f5cea5e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c04a388de58d15d66696048927e9af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb1e5f3c45a5c53940c2fad4658cb69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/0ae83c6c-1abc-4d73-a221-c4cce03141e4.png?resizew=168)
(1)试在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23976db53f05b3d5d791c4d736a7184d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24540ddbb1a3f71004501da5122eb183.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
您最近一年使用:0次