1 . 在长方体
中,
为
的中点,在
中,
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79bdde23fd0de5ed0d3067ebc2be34b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad8a5adae3d6d7160a89a96fa6643ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50943279ee6f0299b3725eecd77bafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f63d194aa0d4091618b6f41f569ee2.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
7日内更新
|
84次组卷
|
2卷引用:河南省周口市鹿邑县第二高级中学校2023-2024学年高一下学期月考测试(三)(6月)数学试题
名校
2 . 如图,在四棱锥
中,平面
平面
,
,底面
为等腰梯形,
,且
.
平面
;
(2)若点A到平面PBC的距离为
,求平面
与平面
夹角的余弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852847ba02c2b62abf27e9cc11f596a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若点A到平面PBC的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
3 . 如图,在平面四边形
中,
,现将
沿
折起,并连接
,使得平面
平面
,若所得三棱锥
的外接球的表面积为
,则三棱锥
的体积为( )
![](https://img.xkw.com/dksih/QBM/2022/9/6/3060423308353536/3066133271535616/STEM/7ea9ef789c1d4d038851c7d36f9a7b7b.png?resizew=323)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9ca96b0480a345bc5a035ca539023d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9609625b502348556ff8ba32deac8caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/2022/9/6/3060423308353536/3066133271535616/STEM/7ea9ef789c1d4d038851c7d36f9a7b7b.png?resizew=323)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-09-14更新
|
2176次组卷
|
6卷引用:广西2023届高三上学期西部联考数学(理)试题
2022高一·全国·专题练习
名校
解题方法
4 . 已知平面α,β,γ,则下列命题中正确的是( )
A.α⊥β,β⊥γ,则α∥γ |
B.α∥β,β⊥γ,则α⊥γ |
C.α∩β=a,β∩γ=b,α⊥β,β⊥γ,则a⊥b |
D.α⊥β,α∩β=a,a⊥b,则b⊥α |
您最近一年使用:0次
2022-04-11更新
|
1492次组卷
|
4卷引用:8.6.3 第2课时 平面与平面垂直的性质(课时作业)-2021-2022学年高一数学同步精品课件+课时作业(人教A版2019必修第二册)
(已下线)8.6.3 第2课时 平面与平面垂直的性质(课时作业)-2021-2022学年高一数学同步精品课件+课时作业(人教A版2019必修第二册)(已下线)13.2.4平面与平面位置关系(3)面面垂直判定与性质(备作业)-【上好课】2021-2022学年高一数学同步备课系列(苏教版2019必修第二册)陕西省咸阳市实验中学2021-2022学年高一上学期第三次月考数学试题(已下线)第8章立体几何初步(基础、典型、易错、压轴)分类专项训练
5 . 如图所示,在等腰梯形
中,
,在等腰梯形
中,
,将等腰梯形
沿
所在直线翻折,使得E,F在平面
上的射影恰好与A,B重合.
![](https://img.xkw.com/dksih/QBM/2022/1/23/2901515314233344/2909373355532288/STEM/62185e876d1c45a08bf64d42c5885951.png?resizew=553)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/873d7c7185a904b8ed550902ec1f5820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725aa3cd046b43f38926fc7c595d9046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2901515314233344/2909373355532288/STEM/62185e876d1c45a08bf64d42c5885951.png?resizew=553)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
名校
6 . 如图,在四棱台
中,底面
为矩形,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/dedd57f5-edc7-4b86-8150-ba5e12922bbc.png?resizew=172)
(1)求证:
;
(2)求直线
和平面
所成角的正弦值.
![](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/384ffa4e596b6c7b8e270217a47f7227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6503add5811927fc11d86f2174f79f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/dedd57f5-edc7-4b86-8150-ba5e12922bbc.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e076e68ef7bab94a6aba990f83159f51.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
您最近一年使用:0次
2022-02-04更新
|
1519次组卷
|
3卷引用:浙江省绍兴市2021-2022学年高三上学期期末数学试题
浙江省绍兴市2021-2022学年高三上学期期末数学试题(已下线)技巧03 解答题解法与技巧(练)--第二篇 解题技巧篇-《2022年高考数学二轮复习讲练测(浙江专用)》上海市实验学校2024届高三上学期暑假阶段反馈数学试题
名校
7 . 如图,在多面体ABCDEF中,平面
平面ABCD,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896491209203712/2897153509392384/STEM/27b397ef1022403aa4e30c0b647472a2.png?resizew=321)
(1)求证:
;
(2)若四边形ACEF为矩形,且
,求直线DF与平面DCE所成角的正弦值;
(3)若四边形ACEF为正方形,在线段AF上是否存在点P,使得二面角
的余弦值为
?若存在,请求出线段AP的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a4e3f0349fa83dc2a0b7d798f04843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://img.xkw.com/dksih/QBM/2022/1/17/2896491209203712/2897153509392384/STEM/27b397ef1022403aa4e30c0b647472a2.png?resizew=321)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c5fd65265f85df7d149d83d80d4e62.png)
(2)若四边形ACEF为矩形,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/755b680b34589e9caa1920bf5a8d3258.png)
(3)若四边形ACEF为正方形,在线段AF上是否存在点P,使得二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/053af8641980763a7f0e77beefe0712d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
您最近一年使用:0次
2022-01-18更新
|
1914次组卷
|
4卷引用:山东省潍坊市2021-2022学年高二上学期期末数学试题
2022高三·全国·专题练习
8 . 如图,已知平面
与直线
均垂直于
所在平面,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/5cadd582-9bd2-46d1-b58c-d19122cdfa19.png?resizew=159)
(1)求证:
平面
;
(2)若
平面
,求二面角
的钝二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad01edc5d969ef89c350b5614c386db9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/5cadd582-9bd2-46d1-b58c-d19122cdfa19.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b61346bd4091070ba84a4046f87f365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44002ba2148c32bacdab4c0a498ffd4a.png)
您最近一年使用:0次
9 . 在空间几何体
中,
平面
,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890852519501824/2893539641008128/STEM/6e265923-9fb9-4e59-b383-67fbd7e8f240.png?resizew=166)
(1)求证:
平面
;
(2)若
平面
,试比较三棱锥
与
的体积的大小,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8a3ffc690e57df945f132e9bffd085.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf7c14f4ecf33ee9938a76c3ac45d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b12b6d1e4fc6fce56bf1bd6d4e41ae1.png)
![](https://img.xkw.com/dksih/QBM/2022/1/9/2890852519501824/2893539641008128/STEM/6e265923-9fb9-4e59-b383-67fbd7e8f240.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b61346bd4091070ba84a4046f87f365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c61c958e98e615a532efaa67d48c3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
解题方法
10 . 在矩形
中,
,
,
在
上运动,设
,将
沿
折起,使得平面
垂直于平面
,
长最小时
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3ebe2470b9f98ce309de1ce700a4b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c3b7bc938bd932c06cfd2ad09bc88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/6cf42247-3218-44ec-95ab-c3e72cea5f4b.png?resizew=220)
您最近一年使用:0次