已知某几何体的直观图及该几何体的三视图如图所示,其中正(主)视图为矩形,俯视图为直角梯形,侧(左)视图为等腰直角三角形,尺寸如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/62339be1-a19c-42c1-8572-19701c3d3e5f.png?resizew=151)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/fcb42b7d-9b97-48e6-848a-722e3a9740b1.png?resizew=204)
(1)求此几何体的体积;
(2)求异面直线AC与
所成角的大小;
(3)求点
到平面
的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/62339be1-a19c-42c1-8572-19701c3d3e5f.png?resizew=151)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/fcb42b7d-9b97-48e6-848a-722e3a9740b1.png?resizew=204)
(1)求此几何体的体积;
(2)求异面直线AC与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
更新时间:2022-11-19 06:59:30
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】长方体
中,
.
(2)记(1)中截面为
,若
与(1)中过
点的长方体的三个表面成二面角分别为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adddcf2b210fdeda3e7795e779bd86aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30816e31c2f392a4c975d539b458d89.png)
(2)记(1)中截面为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a1f9f284b23e927ccffd063cb2d4ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbbde2388c030a896c364e62675190d.png)
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【推荐2】如图,在五面体ABCDEF中,FA⊥平面ABCD,
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74aa71480d770188fc29821999d97e9f.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/16/5ec13246-d7c7-4df6-b1b0-05135ee07da4.png?resizew=182)
(1)求五面体ABCDEF的体积;
(2)若M为EC的中点,求证:平面
平面AMD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd9f608b8362c2a375dd9926a110152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74aa71480d770188fc29821999d97e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee11b995ab36bd4a1149fc1a30acfc99.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/16/5ec13246-d7c7-4df6-b1b0-05135ee07da4.png?resizew=182)
(1)求五面体ABCDEF的体积;
(2)若M为EC的中点,求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c1acdd27cebb11e0266464b03b3afb.png)
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【推荐1】如图,在四棱锥
中,平面
平面
,在
中,
,
为
的中点,四边形
是等腰梯形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/b7a6ef56-fb0d-44c1-88d1-9ae85916b7be.png?resizew=179)
(Ⅰ)求异面直线
与
所成角的正弦值;
(Ⅱ)求证:平面
平面
;
(Ⅲ)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c570a07feeb284d5f4eecd1c4e006a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3632fe2e78a58b234d66ac41d8ea8041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ce8968f7c0cc150347fe12552a398c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/b7a6ef56-fb0d-44c1-88d1-9ae85916b7be.png?resizew=179)
(Ⅰ)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(Ⅱ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1930e9c862abf8853321432cea3858fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
(Ⅲ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,直三棱柱
中,D,E分别是AB,
的中点.
![](https://img.xkw.com/dksih/QBM/2015/11/17/1572294715039744/1572294721167360/STEM/17bd9cf0c00048e58058f9b834ba38a4.png?resizew=179)
(1)证明:
//平面
;
(2)设
,求异面直线
与
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2015/11/17/1572294715039744/1572294721167360/STEM/17bd9cf0c00048e58058f9b834ba38a4.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2499e092d6f011266c4372d1de354a47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,三棱锥
中,
面
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/499f6f7e-3c19-4512-bd78-fdb5fa5e4bc2.png?resizew=155)
(1)求证:
;
(2)若
,求点
到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aedf65d7d930fdb972d4802c0dea8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/499f6f7e-3c19-4512-bd78-fdb5fa5e4bc2.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d8cfc1addf5775a034bef17fa65616.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa3a6cbbb3f384c7cb91ec88c072ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐2】如图所示,在直四棱柱
中,
,
,且
,
,
,M是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/1e9a151a-aa36-426a-a735-a87d1a7a2848.png?resizew=142)
(1)证明
;
(2)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/5408641691fd27f6dd8cf0ab2043ad4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf90bac174f02c4552e56df4d910bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/1e9a151a-aa36-426a-a735-a87d1a7a2848.png?resizew=142)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb2309d4f3e1154a2b929dff6b5e949.png)
(2)求点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67d36d29ac86703724d98da567659ec.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
名校
【推荐3】如下图,在三棱锥
中,
分别是
的中点,
,
.
(1)求证:
平面
;
(2)求异面直线
与
所成角的余弦值;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e7f10e0c8af2d0d02a685f6f19e329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5016f2cf1328d15d090597514b63045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6559aabe16c2318687089e7cc498b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65d5853c26657db448af610ac72cca4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/aedc281f-52e8-442c-9af4-20b48cea5b61.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
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