判断下列命题的真假.
(1)平行于同一条直线的两条直线平行;
(2)平行于同一条直线的两个平面平行;
(3)平行于同一个平面的两条直线平行;
(4)平行于同一个平面的两个平面平行.
(1)平行于同一条直线的两条直线平行;
(2)平行于同一条直线的两个平面平行;
(3)平行于同一个平面的两条直线平行;
(4)平行于同一个平面的两个平面平行.
19-20高一·全国·课后作业 查看更多[3]
人教B版(2019) 必修第四册 逆袭之路 第十一章 立体几何初步 11.3空间中的平行关系(已下线)第十一章 立体几何初步 11.3 空间中的平行关系 11.3.3 平面与平面平行人教B版(2019)必修第四册课本习题习题11-3
更新时间:2020-01-31 21:22:43
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,在正方体
中,E,F,
,
分别是棱AB、AD、
、
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为平行四边形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
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解答题-证明题
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【推荐2】如图,直三棱柱ABC-A1B1C1,∠ACB=90°,E是棱C1的中点,且CF⊥AB,AC=BC.
![](https://img.xkw.com/dksih/QBM/2015/11/26/1572311581736960/1572311587667968/STEM/c95c5723c87244b8943b40d66883d18e.png)
(1)求证:CF∥平面AEB1;
(2)求证:平面AEB1⊥平面ABB1A1.
![](https://img.xkw.com/dksih/QBM/2015/11/26/1572311581736960/1572311587667968/STEM/c95c5723c87244b8943b40d66883d18e.png)
(1)求证:CF∥平面AEB1;
(2)求证:平面AEB1⊥平面ABB1A1.
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解答题-证明题
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名校
【推荐1】如图,矩形
与梯形
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∥
,
,
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,
为
的中点,
为
中点.
(1)求证:平面
∥平面
;
(2)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
平面
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc1f56f32eceda63d28ef199fc9c2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d25313067f3e11f68da496344c4956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a44be92f38e063a01b8cd67418815cd.png)
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(1)求证:平面
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(2)求证:平面
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解答题-作图题
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适中
(0.65)
解题方法
【推荐2】已知四棱锥
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(1)在图中作出平面
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平面SAD (不要求证明);
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的平面角大小为
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值,若不存在,请说明理由.
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(1)在图中作出平面
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(2)若
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