如图,已知多面体
中,平面
⊥平面
,若四边形
为矩形,
∥
,
,
⊥
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2015/7/30/1572195854508032/1572195860471808/STEM/51b4780405b040fa83808484c3767c93.png)
(1)求证:
⊥平面
;
(2)求证:
//平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cf5c5ca2bdfd5a0f6d98a574b2adda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c9a6255f54f395572a922c801aa490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/2015/7/30/1572195854508032/1572195860471808/STEM/51b4780405b040fa83808484c3767c93.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
更新时间:2016-12-03 16:23:34
|
相似题推荐
解答题-问答题
|
适中
(0.64)
【推荐1】如图所示,直三棱柱
中,
,
,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/2018/4/11/1921758521991168/1922389137334272/STEM/0207460c78d74ebbb1706d07fecd0480.png?resizew=161)
(1)若
是
中点,证明:
平面
;
(2)当
时,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e9dc3d488d37fe87140a23a3812333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2018/4/11/1921758521991168/1922389137334272/STEM/0207460c78d74ebbb1706d07fecd0480.png?resizew=161)
(1)若
![](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/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4a1f5a0cdcabfcb417d26f69b337de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54071d324f5b8f05d4afade9effffbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cabc3303519ac16fc998913ad9f349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e363082228a653eb5b0dbc3c6161a9c9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】在四棱锥P﹣ABCD中,PD⊥底面ABCD,底面ABCD是直角梯形,AB∥CD,∠BAD=90°,AB=AD=1,CD=2.
![](https://img.xkw.com/dksih/QBM/2016/4/29/1572609733607424/1572609739571200/STEM/2c336e6e073d4e21a2fc5d0493fd7687.png)
(1)求证:AB∥平面PCD;
(2)求证:BC⊥平面PBD.
![](https://img.xkw.com/dksih/QBM/2016/4/29/1572609733607424/1572609739571200/STEM/2c336e6e073d4e21a2fc5d0493fd7687.png)
(1)求证:AB∥平面PCD;
(2)求证:BC⊥平面PBD.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】在四棱锥
中,底面ABCD为平行四边形,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/c45d6d2a-c096-419f-8b28-fd683fd17477.png?resizew=227)
(1)证明:
;
(2)求直线AP与平面PCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a08e59b74e458744c4d660b475a3d0aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/c45d6d2a-c096-419f-8b28-fd683fd17477.png?resizew=227)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)求直线AP与平面PCD所成角的正弦值.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,长方体
中,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2017/5/9/1683233597046784/1684162260983808/STEM/0c9681c5f89d4e54b31f161c79097d9e.png?resizew=250)
(1)证明:
平面
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643c1d8cdf1415e1e4714463f5cc88c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2017/5/9/1683233597046784/1684162260983808/STEM/0c9681c5f89d4e54b31f161c79097d9e.png?resizew=250)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f11f1840eb8b17e7b07c3fe7e987a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa81c1f81266b4ef3d471bc6bfc38d.png)
您最近一年使用:0次