如图,
,直线a与b分别交
于点A,B,C和点D,E,F,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c153f8691d9143848315ca25f753a415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7c1fc2939654a82b4e4bebb0cbeeba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/3f677442-2661-4ba3-b86c-4afc908dd009.png?resizew=115)
19-20高一·全国·课后作业 查看更多[6]
人教A版(2019) 必修第二册 逆袭之路 第八章 8.5 空间直线、平面的平行 小结上海市位育中学2021-2022学年高二上学期10月月考数学试题(已下线)8.5 空间直线、平面的平行(已下线)知识点 空间点、直线、平面之间的位置关系 易错点 2 空间图形与平面图形混淆致误(已下线)专题7 2022年高考“立体几何”专题命题分析人教A版(2019)必修第二册课本习题 习题8.5
更新时间:2020-02-03 11:00:12
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【知识点】 面面平行证明线线平行
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在三棱柱
中,点
、
分别是
、
上的点,且平面
平面
,试求
的值.
![](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/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf345b86a78e5d8eba3bde4bae43774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424dd73a238dad799c9296e9ff829253.png)
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,四棱锥
的底面是边长为2的正方形,
平面
,点
是
的中点,过点
作平行于平面
的截面,与直线
分别交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/046d231b-e557-4a99-96e0-f258e0b605b1.png?resizew=144)
(1)证明:
.
(2)若四棱锥
的体积为
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b1f8cea475a6f0901d7b426d74a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a8f3a13cb258c61e2a221c2bf09979.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/046d231b-e557-4a99-96e0-f258e0b605b1.png?resizew=144)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29dd8914518df1e2c2899f7fbb00336d.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec5f8432e3f72db0d76f65dc05bce4f.png)
您最近一年使用:0次