如图,在三棱锥
中,
,
是AC的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/41e4fa20-923f-4bcf-913b-696a6101eac1.png?resizew=158)
(1)证明:平面
平面
;
(2)若
,
,求点A到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb350cb6e6764d2fa68f6c4229c24d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6183ebae6c95c17a4e0ab017e12ae8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae16b72924eb24c45f5dcfab07cc01b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/41e4fa20-923f-4bcf-913b-696a6101eac1.png?resizew=158)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
更新时间:2019-09-24 19:16:16
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图,在三棱柱
中,
,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/4bff0f82-0341-4008-b138-e1a1c37ae51f.png?resizew=150)
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c66c6b68e24341aa952e26cb83f5179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/4bff0f82-0341-4008-b138-e1a1c37ae51f.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
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,在长方体
中,
,点
为棱
上的动点.
![](https://img.xkw.com/dksih/QBM/2021/9/28/2818040176115712/2824772461953024/STEM/585c1b965eb24e708e043e7a35c7fa1a.png?resizew=175)
(1)求三棱锥
与长方体
的体积比;
(2)若
为棱
的中点,求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf51cd763a64e808abe0f301548f3e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/2021/9/28/2818040176115712/2824772461953024/STEM/585c1b965eb24e708e043e7a35c7fa1a.png?resizew=175)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5841ecf3472c08cda2bc85ab7a601ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a7bcc1efb8a2ff57d64b6d057da463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9857d5b03bcff4181502765995885383.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
为圆
的直径,点
,
在圆
上,
,矩形
和圆
所在的平面互相垂直,已知
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/22/2533492696711168/2536928321953792/STEM/4c05b47a08404c009c2081fb72df165f.png?resizew=163)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的大小;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c91baecb97fadd4f8ab49e6effcbc04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.png)
![](https://img.xkw.com/dksih/QBM/2020/8/22/2533492696711168/2536928321953792/STEM/4c05b47a08404c009c2081fb72df165f.png?resizew=163)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630675e0bd82419bc787b557181303d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603c7e98deecdba0cf3773757a9b8304.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603c7e98deecdba0cf3773757a9b8304.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,AB是圆O的直径,PA垂直于圆O所在的平面,M是圆周上任意一点,AN⊥PM,垂足为N , AE⊥PB,垂足为E .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/1bde3d78-3988-405c-9ae8-7d9424a1dfb6.png?resizew=140)
(1)求证:平面PAM⊥平面PBM.
(2)求证:
是二面角A-PB-M的平面角.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/1bde3d78-3988-405c-9ae8-7d9424a1dfb6.png?resizew=140)
(1)求证:平面PAM⊥平面PBM.
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c6b651a6c26c24bd84e166ac53b44c3.png)
您最近一年使用:0次