如图所示多面体
中,平面
平面
,
平面
,
是正三角形,四边形
是菱形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/bc12f9c0-a4d3-4805-9e26-595d5fd9cf2d.png?resizew=165)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea37f262f50b2c43b5c5fba506f3f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbaccd578a43b2397c8bdd50592fa07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/bc12f9c0-a4d3-4805-9e26-595d5fd9cf2d.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f70cf3f6c7acbf60d4a4ca0ce89619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
更新时间:2023-11-26 07:49:03
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,三棱柱
中,E为
中点,F为
中点.
![](https://img.xkw.com/dksih/QBM/2022/7/28/3032217737347072/3032979858563072/STEM/3ed8a4762fc84af98081937e97176ae9.png?resizew=175)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若三棱柱
的底面积为6,高为8,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2022/7/28/3032217737347072/3032979858563072/STEM/3ed8a4762fc84af98081937e97176ae9.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d008e2db7380fa8b41fb604e41ef053f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437c9774700f6c066b3e19d17d54b368.png)
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】在三棱锥
中,
,
,点
在棱
上,
.
(1)证明:
;
(2)若
,三棱锥
的体积为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d121aa5eddc1b0af04c4810e44c8f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983ec5b9fd5d080e6e505d36edbfd300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9104a1941e557a85fd1496bc2b9be297.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a916d31a199e250556fb7478d9f57f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4346641491fc90d125ebbd06343382a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
【推荐1】如图,在直三棱柱
中,
,且
.
的表面积与体积;
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
平面
,并求出
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e449c96da8ab75b5137842a8ceba3c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
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解答题-问答题
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【推荐2】如图,在四棱锥中,已知底面ABCD为直角梯形,其中AD∥BC,∠BAD=90°,SA⊥底面ABCD,
.
(1)求四棱锥的体积;
(2)在棱SD上找一点E,使CE∥平面SAB,并证明.
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解答题-证明题
|
适中
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真题
解题方法
【推荐1】已知:平面
平面
直线
.
同垂直于平面
,又同平行于直线b.求证:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670684ed4962fcebce7b5a140510d066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca3f0a4b2d06539e74594736881aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c1318f27701445468b533474f8b752.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b9e79106bbaed747a57fe038ea0934.png)
您最近一年使用:0次
解答题-问答题
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名校
【推荐2】在等腰梯形ABCD中(如图),
,
,
,
,
,现沿DE将等腰梯形折成直二面角.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/c1f7a906-d758-4145-8341-dcef7ec92f7b.jpg?resizew=165)
(1)证明:
平面ACE;
(2)求平面ADE与平面ABC所成二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7a42341edbc0b01ab0769c4c02c3e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/c1f7a906-d758-4145-8341-dcef7ec92f7b.jpg?resizew=165)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
(2)求平面ADE与平面ABC所成二面角的余弦值.
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】在直三棱柱ABC-
中,A
=2,AB=AC=1,AB⊥AC,M,N分别是A
的中点,
![](https://img.xkw.com/dksih/QBM/2021/11/22/2856896679747584/2859850501087232/STEM/4d1a28fb-75c6-41fb-a372-d603aaea70da.png?resizew=175)
(1)求直线MN与B
所成角的余弦值
(2)求N到平面B
M的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48c1c55f7305f4739b772c3c6576701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035a5a88e7e2d6ef2b47d992412a1f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb1258286d13214d9ff2132969c2121.png)
![](https://img.xkw.com/dksih/QBM/2021/11/22/2856896679747584/2859850501087232/STEM/4d1a28fb-75c6-41fb-a372-d603aaea70da.png?resizew=175)
(1)求直线MN与B
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
(2)求N到平面B
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】已知正方体
的棱长为1,求点B到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0a582c36d62d83c16425b2f54b4354.png)
您最近一年使用:0次