如图,在四棱锥
中,底面
是菱形,
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572669819297792/1572669825310720/STEM/65cab0def8944215b5bf9865939bb1bd.png)
(1)求证:
;
(2)若平面
平面
,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572669819297792/1572669825310720/STEM/65cab0def8944215b5bf9865939bb1bd.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a062298f1db766c18c6ab0c64d5bfe63.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba9008f244e609ad267e10b8861c8254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9bbc4be409b7da9d228041833e4b6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89aa6172b55b9afb6ab78d972d6700c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
更新时间:2016-12-04 08:27:51
|
【知识点】 证明异面直线垂直
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在四棱锥
中,
,
,平面
平面ABCD,点E在AD上,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/07f86a00-08a7-41e7-a60e-d04abfcf4c5f.png?resizew=175)
(1)求证:
.
(2)设平面
平面
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3e2bed5ce5fe466395d2f5743d335b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e099f46a617b196facf9e57957447dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f296447f0db174a0f9ba96e704b603.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/07f86a00-08a7-41e7-a60e-d04abfcf4c5f.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc72a44dad13532cb9ddcc64bd78105.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1084a42a7b7600ac9651a023de6d3401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb3e9935870974c4edf4975d3caec0d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】如图,平面
平面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd9ab1392cc6abee73694211c52497c.png)
,
,
![](https://img.xkw.com/dksih/QBM/2015/8/27/1572225228365824/1572225233960960/STEM/b15284664dc2497091fd60bd3fc0532f.png)
(1)求证:
;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa640b17a9d7bfb7242f27fe0a4012a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d3f5f4c4419913c1232b7aae03ade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd9ab1392cc6abee73694211c52497c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ec4e2097286070db0629500782fe82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936c74c9a7edc81c037f4ea795d130bd.png)
![](https://img.xkw.com/dksih/QBM/2015/8/27/1572225228365824/1572225233960960/STEM/b15284664dc2497091fd60bd3fc0532f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d96d289e2cba9878f5d9c8992a64a8d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f63a284b9a1fee77a1f7534c802b814.png)
您最近一年使用:0次