解题方法
1 . 如图,在三棱柱
中,侧面
底面
,
,
,
分别是棱
,
的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a918df66-bc78-4c8e-9c3a-6c2d3bc4cc8d.png?resizew=155)
(1)
∥平面
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](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/36c4559d27e3905980d1a4f1856f07de.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a918df66-bc78-4c8e-9c3a-6c2d3bc4cc8d.png?resizew=155)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c878e789e07e33d65c8a18cf2c58a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b6c68ad9b2e22725f3cbf7c1a3f8dc.png)
您最近一年使用:0次
2020-05-01更新
|
738次组卷
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6卷引用:2020届江苏省南通市基地学校高三下学期第二次大联考数学试题
2020届江苏省南通市基地学校高三下学期第二次大联考数学试题江苏省徐州市2020届高三下学期考前模拟(四模)数学试题(已下线)专题15 空间线面位置关系的证明-2020年高考数学母题题源解密(江苏专版)江苏省徐州市2020届高三(6月份)高考数学考前模拟试题江苏省扬州市高邮市第一中学2020-2021学年高三上学期10月测试数学试题云南省云南师范大学附属镇雄中学2022-2023学年高一下学期5月月考数学试题
名校
解题方法
2 . 如图,已知矩形
和直角梯形
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/55180bcc-5a64-44c7-94b5-517e846b2fc8.png?resizew=186)
(1)求证:
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ff6d7dd48b57f03d82d2c522ee9b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518586d91b63569fc317b323835a0c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/55180bcc-5a64-44c7-94b5-517e846b2fc8.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66058ff40f4ebfc19490eb4e20360752.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/991e1a8f2b85baab1fe2c4d3b49ecf9b.png)
您最近一年使用:0次
2020-03-26更新
|
680次组卷
|
4卷引用:2020届江苏省南京一中高三上学期期中数学试题
3 . 如图,把边长为1的正方形
沿对角线
折成直二面角,若点
满足
,则
( )
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420882788179968/2421575777681408/STEM/79e999c3501048de8bf943e6139b9859.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164d06fc4a17f66d67b5f46370fc1773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fb51bcb1ae05b9dcfd1154c8510593.png)
![](https://img.xkw.com/dksih/QBM/2020/3/16/2420882788179968/2421575777681408/STEM/79e999c3501048de8bf943e6139b9859.png?resizew=158)
A.3 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次
名校
解题方法
4 . 如图,在三棱锥
中,平面
平面
,
为等边三角形,
,且
,E,F分别为AC,PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/c686e2c5-6be9-4775-91ee-9d49f55350b7.png?resizew=183)
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/c686e2c5-6be9-4775-91ee-9d49f55350b7.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
5 . 已知直线m,n和平面
,若
,
,则直线m与直线n的位置关系是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a042a14e1c3c915ad11544c9e1e57da9.png)
A.相交 | B.异面 |
C.相交或异面 | D.相交或异面或平行 |
您最近一年使用:0次
名校
6 . 如果一个四面体的三个面是直角三角形,则其第四个面不可能是( )
A.直角三角形 | B.等边三角形 | C.等腰直角三角形 | D.钝角三角形 |
您最近一年使用:0次
2020-01-31更新
|
176次组卷
|
5卷引用:2017届上海市七宝中学高三下学期综合测试五(5月)数学试题
2017届上海市七宝中学高三下学期综合测试五(5月)数学试题山西省太原市第五中学2020-2021学年高二上学期10月月考数学(文)试题山西省太原市第五中学2020-2021学年高二上学期10月月考数学(理)试题(已下线)第30练 空间点、线、面的位置关系-2021年高考数学(理)一轮复习小题必刷(已下线)课时41 空间直线与平面的位置关系-2022年高考数学一轮复习小题多维练(上海专用)
7 . 如图,长方体
中,
是棱
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/720a0087-4b7d-4380-a930-6ed9e3070626.png?resizew=221)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863ef41313423eb2247c0f9e5ad0f54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/720a0087-4b7d-4380-a930-6ed9e3070626.png?resizew=221)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2394fd037ad92ebc1397c0356e39dff4.png)
(Ⅱ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a5728f3b5606492f22f65f5b9110c4.png)
您最近一年使用:0次
2020-01-30更新
|
903次组卷
|
2卷引用:2020届陕西省咸阳市高三上学期期末考试数学(文)试题
名校
8 . 已知
的三边长分别为
,
,
,M是AB边上的点,P是平面ABC外一点.给出下列四个命题:①若
平面ABC,则三棱锥
的四个面都是直角三角形;②若
平面ABC,且M是边AB的中点,则有
;③若
,
平面ABC,则
面积的最小值为
;④若
,P在平面ABC上的射影是
内切圆的圆心,则点P到平面ABC的距离为
.其中正确命题的序号是________ .(把你认为正确命题的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7442b64b37f685bc3ae88ff450c1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fc65a72853bd8ac1ad0828270d3baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43c2d5aae759fc4db16115c8188ceec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b28f2bfc52cde69845e3fe70cae49b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7163395f9aaa29be7f6b3106ba48b744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43c2d5aae759fc4db16115c8188ceec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ba5418a60abb24191ef4cabddc4fd8.png)
您最近一年使用:0次
2019-12-29更新
|
315次组卷
|
2卷引用:吉林省延边二中2019-2020学年高一上学期12月月考数学试题
名校
9 . 在空间四边形ABCD中,
,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
您最近一年使用:0次
2019-10-10更新
|
67次组卷
|
2卷引用:宁夏银川市育才中学学益校区2019-2020学年高一上学期第二次月考数学试题
名校
10 . 如图所示,四棱锥
的底面为正方形,
底面
,则下列结论中正确结论的序号是_________________ .
①
;②
平面
;③
与平面
所成的角等于
与平面
所成的角;④
与
所成的角等于
与
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fa715d27ae43ec1e157226bc9dea54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9626299838b5f0a615446341a6dca450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/324794c5-dec4-46ab-8aa9-6d2e5d95fb77.png?resizew=209)
您最近一年使用:0次
2019-06-08更新
|
1077次组卷
|
6卷引用:人教A版 全能练习 必修2 第二章 第三节 2.3.3 直线与平面垂直的性质