1 . 已知a、b是直线,
、
、
是平面,给出下列命题:
①若
∥
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b38aa358fe97b47a1d2cb32ffa1f91.png)
,则
∥
②若a、b与
所成角相等,则
∥b
其中正确的命题的序号是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b38aa358fe97b47a1d2cb32ffa1f91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
③若⊥
、
⊥
,则
∥
④若
⊥
,
⊥
,则
∥
其中正确的命题的序号是
您最近一年使用:0次
解题方法
2 . 如图,在四面体
中,
,
,点
,
分别为棱
,
上的点,点
为棱
的中点,且平面
平面
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/52c5b6d4-e2c6-4a19-a72f-e92d7539455a.png?resizew=175)
(1)
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de26c3f532386379ef028cd4e59d12a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/52c5b6d4-e2c6-4a19-a72f-e92d7539455a.png?resizew=175)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee170c82e3dc624dc3016443496a469.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cfcf3b8cd4f355003350a9d45a1619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
3 . 如图,在直四棱柱ABCD-A1B1C1D1中,底面ABCD为等腰梯形,AB∥CD,AB=4,BC=CD=2,AA1=2,E,E1分别是棱AD,AA1的中点.
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168517840896/1573168524017664/STEM/9fc6451a3a80444aa6bc4092dd3b82d4.png?resizew=178)
(1)设F是棱AB的中点,证明:直线EE1∥平面FCC1;
(2)证明:平面D1AC⊥平面BB1C1C;
(3)求点D到平面D1AC的距离.
![](https://img.xkw.com/dksih/QBM/2016/11/23/1573168517840896/1573168524017664/STEM/9fc6451a3a80444aa6bc4092dd3b82d4.png?resizew=178)
(1)设F是棱AB的中点,证明:直线EE1∥平面FCC1;
(2)证明:平面D1AC⊥平面BB1C1C;
(3)求点D到平面D1AC的距离.
您最近一年使用:0次
2016-12-05更新
|
1395次组卷
|
2卷引用:2016-2017学年江苏徐州睢宁县古邳中学高二上第一次月考数学试卷
解题方法
4 . 如图,四棱锥P﹣ABCD中,PA⊥平面ABCD,底面ABCD为矩形,E,F分别为棱AB,PC的中点
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577224704/STEM/7a679be1-f08b-4775-9b1e-453a5b3a69e7.png?resizew=173)
(1)求证:PE⊥BC;
(2)求证:EF
平面PAD.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577224704/STEM/7a679be1-f08b-4775-9b1e-453a5b3a69e7.png?resizew=173)
(1)求证:PE⊥BC;
(2)求证:EF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8cf209933f202dbac6e66d9137b4fb.png)
您最近一年使用:0次
5 . 下列命题中错误的是( )
A.过平面![]() ![]() |
B.与同一个平面所成的角相等的两条直线必平行 |
C.若直线![]() ![]() ![]() ![]() |
D.垂直于同一个平面的两条直线平行 |
您最近一年使用:0次
2014-05-12更新
|
1795次组卷
|
11卷引用:江苏省泰州中学、宜兴中学2018-2019学年高一下学期5月联考数学试题
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